[FIR JS] Add more tests for JS_NAME_CLASH and JS_FAKE_NAME_CLASH

^KT-59425 Related
^KT-59370 Related

compiler/testData/diagnostics/testsWithJsStdLib/name/classInheritance.kt

@@ -0,0 +1,209 @@
+// FIR_IDENTICAL
+
+// FILE: FinalClass.kt
+package FinalClass
+class Class {
+    <!JS_NAME_CLASH!>fun test()<!> {}
+    fun test(x: Int) = x
+    fun test(x: String) = x
+    fun test(vararg x: Any) = x
+
+    <!JS_NAME_CLASH!>val test<!> = 0
+
+    fun Int.test() {}
+    fun Int.test(x: Int)  = x
+
+    fun String.test() {}
+    fun String.test(x: String)  = x
+
+    val Int.test
+        get() = 0
+
+    var String.test
+        get() = ""
+        set(value) { test(value) }
+}
+
+// FILE: OpenClassWithFinalMethods.kt
+package OpenClassWithFinalMethods
+open class Class {
+    fun test() {}
+    fun test(x: Int) = x
+    fun test(x: String) = x
+    fun test(vararg x: Any) = x
+
+    fun Int.test() {}
+    fun Int.test(x: Int)  = x
+
+    fun String.test() {}
+    fun String.test(x: String)  = x
+}
+
+class MyClass1 : Class() {
+    fun test(x: Char) = x
+
+    fun Char.test() {}
+    fun Char.test(x: Char)  = x
+}
+
+// FILE: OpenClassWithOpenMethods.kt
+package OpenClassWithOpenMethods
+open class Class {
+    open fun test() {}
+    open fun test(x: Int) = x
+    open fun test(x: String) = x
+    open fun test(vararg x: Any) = x
+
+    open fun Int.test() {}
+    open fun Int.test(x: Int)  = x
+
+    open fun String.test() {}
+    open fun String.test(x: String)  = x
+}
+
+class MyClass : Class() {
+    fun test(x: List<Int>) = x
+    fun test(vararg x: Int) = x
+
+    fun Char.test() {}
+    val Char.test get() = 'w'
+}
+
+// FILE: OpenInheritedMethodClashedWithChildOverload.kt
+package OpenInheritedMethodClashedWithChildOverload
+open class ExternalClass {
+    <!JS_NAME_CLASH!>@JsName("test") open fun noTest(x: String): String<!> = x
+}
+
+class MyClass : ExternalClass() {
+    <!JS_NAME_CLASH!>fun test()<!> {}
+}
+
+// FILE: OpenInheritedMethodClashedWithChildProperty.kt
+package OpenInheritedMethodClashedWithChildProperty
+open class Class {
+    <!JS_NAME_CLASH!>@JsName("test") open fun test(x: String): String<!> = x
+}
+
+class MyClass : Class() {
+    <!JS_NAME_CLASH!>val test<!> = 1
+}
+
+// FILE: OpenInheritedPropertyClashedWithChildMethod.kt
+package OpenInheritedPropertyClashedWithChildMethod
+open class Class {
+    <!JS_NAME_CLASH!>open val test: String<!> = ""
+}
+
+class MyClass : Class() {
+    <!JS_NAME_CLASH!>fun test()<!> {}
+}
+
+// FILE: OpenInheritedMethodClashedWithChildMethodJsName.kt
+package OpenInheritedMethodClashedWithChildMethodJsName
+open class Class {
+    <!JS_NAME_CLASH!>open fun test()<!> {}
+}
+
+class MyClass : Class() {
+    <!JS_NAME_CLASH!>@JsName("test") fun notTest(x: String)<!> = x
+}
+
+// FILE: OpenInheritedMethodClashedWithChildPropertyJsName.kt
+package OpenInheritedMethodClashedWithChildPropertyJsName
+open class Class {
+    <!JS_NAME_CLASH!>open fun test()<!> {}
+}
+
+class MyClass : Class() {
+    <!JS_NAME_CLASH!>@JsName("test") val notTest<!> = 1
+}
+
+// FILE: OpenInheritedMethodClashedWithChildPropertyGetterJsName.kt
+package OpenInheritedMethodClashedWithChildPropertyGetterJsName
+open class Class {
+    <!JS_NAME_CLASH!>open fun test()<!> {}
+}
+
+class MyClass : Class() {
+    val notTest: Int
+        <!JS_NAME_CLASH!>@JsName("test") get()<!> = 1
+}
+
+// FILE: OpenInheritedMethodClashedWithChildPropertySetterJsName.kt
+package OpenInheritedMethodClashedWithChildPropertySetterJsName
+open class Class {
+    <!JS_NAME_CLASH!>open fun test()<!> {}
+}
+
+class MyClass : Class() {
+    fun <T> ignore(x: T) = x
+
+    var notTest: Int
+    @JsName("getterTest") get() = 1
+    <!JS_NAME_CLASH!>@JsName("test") set(value)<!> { ignore(value) }
+}
+
+// FILE: OpenInheritedMethodClashedWithOtherInheritedMethod.kt
+package OpenInheritedMethodClashedWithOtherInheritedMethod
+open class Class {
+    open fun test() {}
+}
+
+interface MyInterface {
+    @JsName("test") fun noTest(x: Int) = 1
+}
+
+class <!JS_FAKE_NAME_CLASH!>MyClass<!> : Class(), MyInterface
+
+// FILE: OpenInheritedMethodNotClashedWithAbstractMethod.kt
+package OpenInheritedMethodNotClashedWithAbstractMethod
+open class Class {
+    open fun test(): String = ""
+}
+
+interface MyInterface {
+    fun test(): String
+}
+
+class MyClass : Class(), MyInterface
+
+// FILE: OpenInheritedMethodNotClashedWithDefaultInterfaceMethod.kt
+package OpenInheritedMethodNotClashedWithDefaultInterfaceMethod
+open class Class {
+    open fun test(): String = "0"
+}
+
+interface MyInterface {
+    fun test(): String = "1"
+}
+
+class MyClass : Class(), MyInterface {
+    override fun test(): String = "2"
+}
+
+// FILE: InterfaceImplementationWithSameJsNameClash.kt
+package MultipleInterfaceInheritanceWithSameJsNameClash
+interface MyInterface1 {
+    @JsName("test") fun test1(): Int
+}
+
+class MyClass : MyInterface1 {
+    <!JS_NAME_CLASH!>override fun test1()<!> = 1
+    <!JS_NAME_CLASH!>@JsName("test") fun test2(): Int<!> = 2
+}
+
+// FILE: MultipleInterfaceImplementationWithSameJsNameClash.kt
+package MultipleInterfaceImplementationWithSameJsNameClash
+interface MyInterface1 {
+    @JsName("test") fun test1(): Int
+}
+
+interface MyInterface2 {
+    @JsName("test") fun test2(): Int
+}
+
+class MyClass : MyInterface1, MyInterface2 {
+    <!JS_NAME_CLASH!>override fun test1()<!> = 1
+    <!JS_NAME_CLASH!>override fun test2()<!> = 2
+}

compiler/testData/diagnostics/testsWithJsStdLib/name/classInheritance.txt

@@ -0,0 +1,361 @@
+package
+
+package FinalClass {
+
+    public final class Class {
+        public constructor Class()
+        public final val test: kotlin.Int = 0
+        public final val kotlin.Int.test: kotlin.Int
+        public final var kotlin.String.test: kotlin.String
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public final fun test(): kotlin.Unit
+        public final fun test(/*0*/ vararg x: kotlin.Any /*kotlin.Array<out kotlin.Any>*/): kotlin.Array<out kotlin.Any>
+        public final fun test(/*0*/ x: kotlin.Int): kotlin.Int
+        public final fun test(/*0*/ x: kotlin.String): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+        public final fun kotlin.Int.test(): kotlin.Unit
+        public final fun kotlin.Int.test(/*0*/ x: kotlin.Int): kotlin.Int
+        public final fun kotlin.String.test(): kotlin.Unit
+        public final fun kotlin.String.test(/*0*/ x: kotlin.String): kotlin.String
+    }
+}
+
+package MultipleInterfaceImplementationWithSameJsNameClash {
+
+    public final class MyClass : MultipleInterfaceImplementationWithSameJsNameClash.MyInterface1, MultipleInterfaceImplementationWithSameJsNameClash.MyInterface2 {
+        public constructor MyClass()
+        public open override /*2*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*2*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ fun test1(): kotlin.Int
+        public open override /*1*/ fun test2(): kotlin.Int
+        public open override /*2*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public interface MyInterface1 {
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        @kotlin.js.JsName(name = "test") public abstract fun test1(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public interface MyInterface2 {
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        @kotlin.js.JsName(name = "test") public abstract fun test2(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+package MultipleInterfaceInheritanceWithSameJsNameClash {
+
+    public final class MyClass : MultipleInterfaceInheritanceWithSameJsNameClash.MyInterface1 {
+        public constructor MyClass()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ fun test1(): kotlin.Int
+        @kotlin.js.JsName(name = "test") public final fun test2(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public interface MyInterface1 {
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        @kotlin.js.JsName(name = "test") public abstract fun test1(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+package OpenClassWithFinalMethods {
+
+    public open class Class {
+        public constructor Class()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public final fun test(): kotlin.Unit
+        public final fun test(/*0*/ vararg x: kotlin.Any /*kotlin.Array<out kotlin.Any>*/): kotlin.Array<out kotlin.Any>
+        public final fun test(/*0*/ x: kotlin.Int): kotlin.Int
+        public final fun test(/*0*/ x: kotlin.String): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+        public final fun kotlin.Int.test(): kotlin.Unit
+        public final fun kotlin.Int.test(/*0*/ x: kotlin.Int): kotlin.Int
+        public final fun kotlin.String.test(): kotlin.Unit
+        public final fun kotlin.String.test(/*0*/ x: kotlin.String): kotlin.String
+    }
+
+    public final class MyClass1 : OpenClassWithFinalMethods.Class {
+        public constructor MyClass1()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public final override /*1*/ /*fake_override*/ fun test(): kotlin.Unit
+        public final override /*1*/ /*fake_override*/ fun test(/*0*/ vararg x: kotlin.Any /*kotlin.Array<out kotlin.Any>*/): kotlin.Array<out kotlin.Any>
+        public final fun test(/*0*/ x: kotlin.Char): kotlin.Char
+        public final override /*1*/ /*fake_override*/ fun test(/*0*/ x: kotlin.Int): kotlin.Int
+        public final override /*1*/ /*fake_override*/ fun test(/*0*/ x: kotlin.String): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+        public final fun kotlin.Char.test(): kotlin.Unit
+        public final fun kotlin.Char.test(/*0*/ x: kotlin.Char): kotlin.Char
+        public final override /*1*/ /*fake_override*/ fun kotlin.Int.test(): kotlin.Unit
+        public final override /*1*/ /*fake_override*/ fun kotlin.Int.test(/*0*/ x: kotlin.Int): kotlin.Int
+        public final override /*1*/ /*fake_override*/ fun kotlin.String.test(): kotlin.Unit
+        public final override /*1*/ /*fake_override*/ fun kotlin.String.test(/*0*/ x: kotlin.String): kotlin.String
+    }
+}
+
+package OpenClassWithOpenMethods {
+
+    public open class Class {
+        public constructor Class()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open fun test(): kotlin.Unit
+        public open fun test(/*0*/ vararg x: kotlin.Any /*kotlin.Array<out kotlin.Any>*/): kotlin.Array<out kotlin.Any>
+        public open fun test(/*0*/ x: kotlin.Int): kotlin.Int
+        public open fun test(/*0*/ x: kotlin.String): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+        public open fun kotlin.Int.test(): kotlin.Unit
+        public open fun kotlin.Int.test(/*0*/ x: kotlin.Int): kotlin.Int
+        public open fun kotlin.String.test(): kotlin.Unit
+        public open fun kotlin.String.test(/*0*/ x: kotlin.String): kotlin.String
+    }
+
+    public final class MyClass : OpenClassWithOpenMethods.Class {
+        public constructor MyClass()
+        public final val kotlin.Char.test: kotlin.Char
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun test(): kotlin.Unit
+        public open override /*1*/ /*fake_override*/ fun test(/*0*/ vararg x: kotlin.Any /*kotlin.Array<out kotlin.Any>*/): kotlin.Array<out kotlin.Any>
+        public open override /*1*/ /*fake_override*/ fun test(/*0*/ x: kotlin.Int): kotlin.Int
+        public final fun test(/*0*/ vararg x: kotlin.Int /*kotlin.IntArray*/): kotlin.IntArray
+        public open override /*1*/ /*fake_override*/ fun test(/*0*/ x: kotlin.String): kotlin.String
+        public final fun test(/*0*/ x: kotlin.collections.List<kotlin.Int>): kotlin.collections.List<kotlin.Int>
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+        public final fun kotlin.Char.test(): kotlin.Unit
+        public open override /*1*/ /*fake_override*/ fun kotlin.Int.test(): kotlin.Unit
+        public open override /*1*/ /*fake_override*/ fun kotlin.Int.test(/*0*/ x: kotlin.Int): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun kotlin.String.test(): kotlin.Unit
+        public open override /*1*/ /*fake_override*/ fun kotlin.String.test(/*0*/ x: kotlin.String): kotlin.String
+    }
+}
+
+package OpenInheritedMethodClashedWithChildMethodJsName {
+
+    public open class Class {
+        public constructor Class()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open fun test(): kotlin.Unit
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public final class MyClass : OpenInheritedMethodClashedWithChildMethodJsName.Class {
+        public constructor MyClass()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        @kotlin.js.JsName(name = "test") public final fun notTest(/*0*/ x: kotlin.String): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun test(): kotlin.Unit
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+package OpenInheritedMethodClashedWithChildOverload {
+
+    public open class ExternalClass {
+        public constructor ExternalClass()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        @kotlin.js.JsName(name = "test") public open fun noTest(/*0*/ x: kotlin.String): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public final class MyClass : OpenInheritedMethodClashedWithChildOverload.ExternalClass {
+        public constructor MyClass()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        @kotlin.js.JsName(name = "test") public open override /*1*/ /*fake_override*/ fun noTest(/*0*/ x: kotlin.String): kotlin.String
+        public final fun test(): kotlin.Unit
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+package OpenInheritedMethodClashedWithChildProperty {
+
+    public open class Class {
+        public constructor Class()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        @kotlin.js.JsName(name = "test") public open fun test(/*0*/ x: kotlin.String): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public final class MyClass : OpenInheritedMethodClashedWithChildProperty.Class {
+        public constructor MyClass()
+        public final val test: kotlin.Int = 1
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        @kotlin.js.JsName(name = "test") public open override /*1*/ /*fake_override*/ fun test(/*0*/ x: kotlin.String): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+package OpenInheritedMethodClashedWithChildPropertyGetterJsName {
+
+    public open class Class {
+        public constructor Class()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open fun test(): kotlin.Unit
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public final class MyClass : OpenInheritedMethodClashedWithChildPropertyGetterJsName.Class {
+        public constructor MyClass()
+        @get:kotlin.js.JsName(name = "test") public final val notTest: kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun test(): kotlin.Unit
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+package OpenInheritedMethodClashedWithChildPropertyJsName {
+
+    public open class Class {
+        public constructor Class()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open fun test(): kotlin.Unit
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public final class MyClass : OpenInheritedMethodClashedWithChildPropertyJsName.Class {
+        public constructor MyClass()
+        @kotlin.js.JsName(name = "test") public final val notTest: kotlin.Int = 1
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun test(): kotlin.Unit
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+package OpenInheritedMethodClashedWithChildPropertySetterJsName {
+
+    public open class Class {
+        public constructor Class()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open fun test(): kotlin.Unit
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public final class MyClass : OpenInheritedMethodClashedWithChildPropertySetterJsName.Class {
+        public constructor MyClass()
+        @get:kotlin.js.JsName(name = "getterTest") @set:kotlin.js.JsName(name = "test") public final var notTest: kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public final fun </*0*/ T> ignore(/*0*/ x: T): T
+        public open override /*1*/ /*fake_override*/ fun test(): kotlin.Unit
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+package OpenInheritedMethodClashedWithOtherInheritedMethod {
+
+    public open class Class {
+        public constructor Class()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open fun test(): kotlin.Unit
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public final class MyClass : OpenInheritedMethodClashedWithOtherInheritedMethod.Class, OpenInheritedMethodClashedWithOtherInheritedMethod.MyInterface {
+        public constructor MyClass()
+        public open override /*2*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*2*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        @kotlin.js.JsName(name = "test") public open override /*1*/ /*fake_override*/ fun noTest(/*0*/ x: kotlin.Int): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun test(): kotlin.Unit
+        public open override /*2*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public interface MyInterface {
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        @kotlin.js.JsName(name = "test") public open fun noTest(/*0*/ x: kotlin.Int): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+package OpenInheritedMethodNotClashedWithAbstractMethod {
+
+    public open class Class {
+        public constructor Class()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open fun test(): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public final class MyClass : OpenInheritedMethodNotClashedWithAbstractMethod.Class, OpenInheritedMethodNotClashedWithAbstractMethod.MyInterface {
+        public constructor MyClass()
+        public open override /*2*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*2*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*2*/ /*fake_override*/ fun test(): kotlin.String
+        public open override /*2*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public interface MyInterface {
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public abstract fun test(): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+package OpenInheritedMethodNotClashedWithDefaultInterfaceMethod {
+
+    public open class Class {
+        public constructor Class()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open fun test(): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public final class MyClass : OpenInheritedMethodNotClashedWithDefaultInterfaceMethod.Class, OpenInheritedMethodNotClashedWithDefaultInterfaceMethod.MyInterface {
+        public constructor MyClass()
+        public open override /*2*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*2*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*2*/ fun test(): kotlin.String
+        public open override /*2*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public interface MyInterface {
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open fun test(): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+package OpenInheritedPropertyClashedWithChildMethod {
+
+    public open class Class {
+        public constructor Class()
+        public open val test: kotlin.String = ""
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public final class MyClass : OpenInheritedPropertyClashedWithChildMethod.Class {
+        public constructor MyClass()
+        public open override /*1*/ /*fake_override*/ val test: kotlin.String
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public final fun test(): kotlin.Unit
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+

compiler/testData/diagnostics/testsWithJsStdLib/name/classInheritanceExtensions.fir.kt

@@ -0,0 +1,11 @@
+// FIR_DIFFERENCE
+// This case is only relevant for the JS Legacy BE and is not applicable to the JS IR backend,
+// as the IR BE can resolve such name collisions.
+
+open class Class {
+    fun Int.test() {}
+    val Int.test
+        get() = 0
+}
+
+class MyClass1 : Class()

compiler/testData/diagnostics/testsWithJsStdLib/name/classInheritanceExtensions.kt

@@ -0,0 +1,11 @@
+// FIR_DIFFERENCE
+// This case is only relevant for the JS Legacy BE and is not applicable to the JS IR backend,
+// as the IR BE can resolve such name collisions.
+
+open class Class {
+    fun Int.test() {}
+    val Int.test
+        get() = 0
+}
+
+class <!JS_FAKE_NAME_CLASH!>MyClass1<!> : Class()

compiler/testData/diagnostics/testsWithJsStdLib/name/classInheritanceExtensions.txt

@@ -0,0 +1,20 @@
+package
+
+public open class Class {
+    public constructor Class()
+    public final val kotlin.Int.test: kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    public final fun kotlin.Int.test(): kotlin.Unit
+}
+
+public final class MyClass1 : Class {
+    public constructor MyClass1()
+    public final override /*1*/ /*fake_override*/ val kotlin.Int.test: kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    public final override /*1*/ /*fake_override*/ fun kotlin.Int.test(): kotlin.Unit
+}
+

compiler/testData/diagnostics/testsWithJsStdLib/name/classMembers.kt

@@ -0,0 +1,207 @@
+// FIR_IDENTICAL
+@file:Suppress("UNUSED_PARAMETER", "CONFLICTING_OVERLOADS", "REDECLARATION")
+
+class A1 {
+    fun foo(x: Int) {}
+    fun foo(x: String) {}
+}
+
+class A2 {
+    fun Int.foo() {}
+    fun String.foo() {}
+}
+
+class A3 {
+    fun foo(x: Int) {}
+    fun Int.foo() {}
+}
+
+class A4 {
+    fun foo(x: Int) {}
+    val foo = 1
+}
+
+class A5 {
+    <!JS_NAME_CLASH!>fun foo()<!> {}
+    <!JS_NAME_CLASH!>val foo<!> = 1
+}
+
+class A6 {
+    fun Int.foo() {}
+    val foo = 1
+}
+
+class A7 {
+    fun Int.foo() {}
+    val Int.foo get() = 1
+}
+
+class A8 {
+    val foo = 1
+    val Int.foo get() = 1
+}
+
+class A9 {
+    val String.foo get() = 1
+    val Int.foo get() = 1
+}
+
+class A10 {
+    fun foo(vararg x: Int) {}
+    fun foo() {}
+}
+
+class A14 {
+    fun foo(vararg x: Int) {}
+    fun foo(x: Int) {}
+}
+
+class A15 {
+    fun foo(vararg x: Int) {}
+    fun foo(vararg x: String) {}
+}
+
+class A16 {
+    fun foo(vararg x: Int) {}
+    val foo = 1
+}
+
+class A17 {
+    fun foo(vararg x: Int) {}
+    val Int.foo get() = 1
+}
+
+class A18 {
+    fun foo(vararg x: Int) {}
+    fun Int.foo() = 1
+}
+
+class A19 {
+    <!JS_NAME_CLASH!>fun setFoo()<!> {}
+    var foo: Int
+        @JsName("getFoo") get() = 1
+        <!JS_NAME_CLASH!>@JsName("setFoo") set(value: Int)<!> {}
+}
+
+class A20 {
+    fun setFoo(x: Int) {}
+    var foo: Int
+        @JsName("getFoo") get() = 1
+        @JsName("setFoo") set(value: Int) {}
+}
+
+class A21 {
+    <!JS_NAME_CLASH!>fun foo()<!> {}
+    <!JS_NAME_CLASH!>@JsName("foo") fun bar()<!> {}
+}
+
+class A22 {
+    fun foo(x: Int) {}
+    @JsName("foo") fun bar() {}
+}
+
+class A23 {
+    <!JS_NAME_CLASH!>val foo<!> = 1
+    <!JS_NAME_CLASH!>@JsName("foo") fun bar()<!> {}
+}
+
+class A24 {
+    <!JS_NAME_CLASH!>@JsName("foo") val bar<!> = 1
+    <!JS_NAME_CLASH!>fun foo()<!> {}
+}
+
+class A25 {
+    @JsName("foo") val bar = 1
+    fun foo(x: Int) {}
+}
+
+class A26 {
+    <!JS_NAME_CLASH!>fun foo()<!> {}
+    <!JS_NAME_CLASH!>var foo: Int<!>
+        get() = 1
+        set(value: Int) {}
+}
+
+class A27 {
+    <!JS_NAME_CLASH!>@JsName("foo") fun bar()<!> {}
+    <!JS_NAME_CLASH!>var foo: Int<!>
+        get() = 1
+        set(value: Int) {}
+}
+
+class A28 {
+    fun foo(x: Int) {}
+    var foo: Int
+        get() = 1
+        set(value: Int) {}
+}
+
+class A29 {
+    <!JS_NAME_CLASH!>val foo<!> get() = 1
+    <!JS_NAME_CLASH!>@JsName("foo") fun bar()<!> {}
+}
+
+class A30 {
+    val Int.foo get() = 1
+    @JsName("foo") fun bar() {}
+}
+
+class A31 {
+    <!JS_NAME_CLASH!>object foo<!>
+    <!JS_NAME_CLASH!>fun foo()<!> {}
+}
+
+class A32 {
+    object foo
+    fun foo(x: Int) {}
+}
+
+class A33 {
+    <!JS_NAME_CLASH!>object foo<!>
+    <!JS_NAME_CLASH!>val foo<!> = 1
+}
+
+class A34 {
+    object foo
+    val String.foo get() = 1
+}
+
+class A35 {
+    companion <!JS_NAME_CLASH!>object foo<!>
+    <!JS_NAME_CLASH!>fun foo()<!> {}
+}
+
+class A36 {
+    companion object foo
+    fun foo(x: Int) {}
+}
+
+class A37 {
+    companion <!JS_NAME_CLASH!>object foo<!>
+    <!JS_NAME_CLASH!>val foo<!> = 1
+}
+
+class A38 {
+    companion object foo
+    val String.foo get() = 1
+}
+
+class A39 {
+    class <!JS_NAME_CLASH!>foo<!>
+    <!JS_NAME_CLASH!>fun foo()<!> {}
+}
+
+class A40 {
+    class foo
+    fun foo(x: Int) {}
+}
+
+class A41 {
+    class <!JS_NAME_CLASH!>foo<!>
+    <!JS_NAME_CLASH!>val foo<!> = 1
+}
+
+class A42 {
+    class foo
+    val String.foo get() = 1
+}

compiler/testData/diagnostics/testsWithJsStdLib/name/classMembers.txt

@@ -0,0 +1,425 @@
+package
+
+public final class A1 {
+    public constructor A1()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public final fun foo(/*0*/ x: kotlin.Int): kotlin.Unit
+    public final fun foo(/*0*/ x: kotlin.String): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class A10 {
+    public constructor A10()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public final fun foo(): kotlin.Unit
+    public final fun foo(/*0*/ vararg x: kotlin.Int /*kotlin.IntArray*/): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class A14 {
+    public constructor A14()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public final fun foo(/*0*/ x: kotlin.Int): kotlin.Unit
+    public final fun foo(/*0*/ vararg x: kotlin.Int /*kotlin.IntArray*/): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class A15 {
+    public constructor A15()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public final fun foo(/*0*/ vararg x: kotlin.String /*kotlin.Array<out kotlin.String>*/): kotlin.Unit
+    public final fun foo(/*0*/ vararg x: kotlin.Int /*kotlin.IntArray*/): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class A16 {
+    public constructor A16()
+    public final val foo: kotlin.Int = 1
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public final fun foo(/*0*/ vararg x: kotlin.Int /*kotlin.IntArray*/): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class A17 {
+    public constructor A17()
+    public final val kotlin.Int.foo: kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public final fun foo(/*0*/ vararg x: kotlin.Int /*kotlin.IntArray*/): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class A18 {
+    public constructor A18()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public final fun foo(/*0*/ vararg x: kotlin.Int /*kotlin.IntArray*/): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    public final fun kotlin.Int.foo(): kotlin.Int
+}
+
+public final class A19 {
+    public constructor A19()
+    @get:kotlin.js.JsName(name = "getFoo") @set:kotlin.js.JsName(name = "setFoo") public final var foo: kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public final fun setFoo(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class A2 {
+    public constructor A2()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    public final fun kotlin.Int.foo(): kotlin.Unit
+    public final fun kotlin.String.foo(): kotlin.Unit
+}
+
+public final class A20 {
+    public constructor A20()
+    @get:kotlin.js.JsName(name = "getFoo") @set:kotlin.js.JsName(name = "setFoo") public final var foo: kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public final fun setFoo(/*0*/ x: kotlin.Int): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class A21 {
+    public constructor A21()
+    @kotlin.js.JsName(name = "foo") public final fun bar(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public final fun foo(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class A22 {
+    public constructor A22()
+    @kotlin.js.JsName(name = "foo") public final fun bar(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public final fun foo(/*0*/ x: kotlin.Int): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class A23 {
+    public constructor A23()
+    public final val foo: kotlin.Int = 1
+    @kotlin.js.JsName(name = "foo") public final fun bar(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class A24 {
+    public constructor A24()
+    @kotlin.js.JsName(name = "foo") public final val bar: kotlin.Int = 1
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public final fun foo(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class A25 {
+    public constructor A25()
+    @kotlin.js.JsName(name = "foo") public final val bar: kotlin.Int = 1
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public final fun foo(/*0*/ x: kotlin.Int): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class A26 {
+    public constructor A26()
+    public final var foo: kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public final fun foo(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class A27 {
+    public constructor A27()
+    public final var foo: kotlin.Int
+    @kotlin.js.JsName(name = "foo") public final fun bar(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class A28 {
+    public constructor A28()
+    public final var foo: kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public final fun foo(/*0*/ x: kotlin.Int): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class A29 {
+    public constructor A29()
+    public final val foo: kotlin.Int
+    @kotlin.js.JsName(name = "foo") public final fun bar(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class A3 {
+    public constructor A3()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public final fun foo(/*0*/ x: kotlin.Int): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    public final fun kotlin.Int.foo(): kotlin.Unit
+}
+
+public final class A30 {
+    public constructor A30()
+    public final val kotlin.Int.foo: kotlin.Int
+    @kotlin.js.JsName(name = "foo") public final fun bar(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class A31 {
+    public constructor A31()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public final fun foo(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+
+    public object foo {
+        private constructor foo()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+public final class A32 {
+    public constructor A32()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public final fun foo(/*0*/ x: kotlin.Int): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+
+    public object foo {
+        private constructor foo()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+public final class A33 {
+    public constructor A33()
+    public final val foo: kotlin.Int = 1
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+
+    public object foo {
+        private constructor foo()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+public final class A34 {
+    public constructor A34()
+    public final val kotlin.String.foo: kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+
+    public object foo {
+        private constructor foo()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+public final class A35 {
+    public constructor A35()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public final fun foo(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+
+    public companion object foo {
+        private constructor foo()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+public final class A36 {
+    public constructor A36()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public final fun foo(/*0*/ x: kotlin.Int): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+
+    public companion object foo {
+        private constructor foo()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+public final class A37 {
+    public constructor A37()
+    public final val foo: kotlin.Int = 1
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+
+    public companion object foo {
+        private constructor foo()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+public final class A38 {
+    public constructor A38()
+    public final val kotlin.String.foo: kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+
+    public companion object foo {
+        private constructor foo()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+public final class A39 {
+    public constructor A39()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public final fun foo(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+
+    public final class foo {
+        public constructor foo()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+public final class A4 {
+    public constructor A4()
+    public final val foo: kotlin.Int = 1
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public final fun foo(/*0*/ x: kotlin.Int): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class A40 {
+    public constructor A40()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public final fun foo(/*0*/ x: kotlin.Int): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+
+    public final class foo {
+        public constructor foo()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+public final class A41 {
+    public constructor A41()
+    public final val foo: kotlin.Int = 1
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+
+    public final class foo {
+        public constructor foo()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+public final class A42 {
+    public constructor A42()
+    public final val kotlin.String.foo: kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+
+    public final class foo {
+        public constructor foo()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+public final class A5 {
+    public constructor A5()
+    public final val foo: kotlin.Int = 1
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public final fun foo(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class A6 {
+    public constructor A6()
+    public final val foo: kotlin.Int = 1
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    public final fun kotlin.Int.foo(): kotlin.Unit
+}
+
+public final class A7 {
+    public constructor A7()
+    public final val kotlin.Int.foo: kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    public final fun kotlin.Int.foo(): kotlin.Unit
+}
+
+public final class A8 {
+    public constructor A8()
+    public final val foo: kotlin.Int = 1
+    public final val kotlin.Int.foo: kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class A9 {
+    public constructor A9()
+    public final val kotlin.Int.foo: kotlin.Int
+    public final val kotlin.String.foo: kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+

compiler/testData/diagnostics/testsWithJsStdLib/name/extensionPropertyAndMethodWithJsName.kt

@@ -0,0 +1,9 @@
+// FIR_IDENTICAL
+package foo
+
+class A
+
+<!JS_NAME_CLASH!>@JsName("get_bar") fun A.get_bar()<!> = 23
+
+val A.bar: Int
+  <!JS_NAME_CLASH!>@JsName("get_bar") get()<!> = 42

compiler/testData/diagnostics/testsWithJsStdLib/name/extensionPropertyAndMethodWithJsName.txt

@@ -0,0 +1,14 @@
+package
+
+package foo {
+    @get:kotlin.js.JsName(name = "get_bar") public val foo.A.bar: kotlin.Int
+    @kotlin.js.JsName(name = "get_bar") public fun foo.A.get_bar(): kotlin.Int
+
+    public final class A {
+        public constructor A()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+

compiler/testData/diagnostics/testsWithJsStdLib/name/externalClassInheritance.kt

@@ -0,0 +1,223 @@
+// FIR_IDENTICAL
+
+// FILE: FinalExternalClass.kt
+package FinalExternalClass
+external class ExternalClass {
+    fun test(): String
+    fun test(x: Int): String
+    fun test(x: String): String
+    fun test(vararg x: Any): String
+
+    val test: String
+
+    @JsName("test")
+    fun notTest(): String
+
+    @JsName("test")
+    val notTest: String
+}
+
+// FILE: OpenExternalClassWithFinalMethods.kt
+package OpenExternalClassWithFinalMethods
+open external class ExternalClass {
+    fun test(): String
+    fun test(x: Int): String
+    fun test(x: String): String
+    fun test(vararg x: Any): String
+
+    val test: String
+
+    @JsName("test")
+    fun notTest(): String
+
+    @JsName("test")
+    val notTest: String
+}
+
+class MyClass1 : ExternalClass() {
+    fun test(x: List<Int>) = x
+    fun test(vararg x: Int) = x
+
+    fun Int.test() {}
+    val Int.test get() = 1
+
+    @JsName("test") fun notTest2() {}
+}
+
+class MyClass2 : ExternalClass() {
+    fun test(x: List<Int>) = x
+    fun test(vararg x: Int) = x
+
+    fun Int.test() {}
+    val Int.test get() = 1
+
+    @JsName("test") val notTest2 = 1
+}
+
+// FILE: OpenExternalClassWithOpenMethods.kt
+package OpenExternalClassWithOpenMethods
+open external class ExternalClass {
+    open fun test(): String
+    open fun test(x: Int): String
+    open fun test(x: String): String
+    open fun test(vararg x: Any): String
+
+    open val test: String
+
+    @JsName("test")
+    open fun notTest(): String
+
+    @JsName("test")
+    open val notTest: String
+}
+
+class MyClass : ExternalClass() {
+    fun test(x: List<Int>) = x
+    fun test(vararg x: Int) = x
+
+    fun Int.test() {}
+    val Int.test get() = 1
+}
+
+// FILE: OpenInheritedMethodClashedWithChildOverload.kt
+package OpenInheritedMethodClashedWithChildOverload
+open external class ExternalClass {
+    <!JS_NAME_CLASH!>open fun test(x: Int): String<!>
+}
+
+class MyClass : ExternalClass() {
+    <!JS_NAME_CLASH!>fun test()<!> {}
+}
+
+// FILE: OpenInheritedMethodClashedWithChildProperty.kt
+package OpenInheritedMethodClashedWithChildProperty
+open external class ExternalClass {
+    <!JS_NAME_CLASH!>open fun test(x: Int): String<!>
+}
+
+class MyClass : ExternalClass() {
+    <!JS_NAME_CLASH!>val test<!> = 1
+}
+
+// FILE: OpenInheritedPropertyClashedWithChildMethod.kt
+package OpenInheritedPropertyClashedWithChildMethod
+open external class ExternalClass {
+    <!JS_NAME_CLASH!>open val test: String<!>
+}
+
+class MyClass : ExternalClass() {
+    <!JS_NAME_CLASH!>fun test()<!> {}
+}
+
+// FILE: OpenInheritedMethodClashedWithChildOverridde.kt
+package OpenInheritedMethodClashedWithChildOverridde
+open external class ExternalClass {
+    open fun test(x: Int): Int
+    <!JS_NAME_CLASH!>open fun test(x: String): String<!>
+}
+
+class MyClass : ExternalClass() {
+    <!JS_NAME_CLASH!>override fun test(x: Int)<!> = x
+}
+
+// FILE: OpenInheritedMethodClashedWithChildPropertyOverridde.kt
+package OpenInheritedMethodClashedWithChildPropertyOverridde
+open external class ExternalClass {
+    open val test: Int
+    <!JS_NAME_CLASH!>open fun test(x: String): String<!>
+}
+
+class MyClass : ExternalClass() {
+    <!JS_NAME_CLASH!>override val test<!> = 1
+}
+
+// FILE: OpenInheritedMethodClashedWithChildMethodJsName.kt
+package OpenInheritedMethodClashedWithChildMethodJsName
+open external class ExternalClass {
+    <!JS_NAME_CLASH!>open fun test(x: String): String<!>
+}
+
+class MyClass : ExternalClass() {
+    <!JS_NAME_CLASH!>@JsName("test") fun notTest(x: String)<!> = x
+}
+
+// FILE: OpenInheritedMethodClashedWithChildPropertyJsName.kt
+package OpenInheritedMethodClashedWithChildPropertyJsName
+open external class ExternalClass {
+    <!JS_NAME_CLASH!>open fun test(x: String): String<!>
+}
+
+class MyClass : ExternalClass() {
+    <!JS_NAME_CLASH!>@JsName("test") val notTest<!> = 1
+}
+
+// FILE: OpenInheritedMethodClashedWithChildPropertyGetterJsName.kt
+package OpenInheritedMethodClashedWithChildPropertyGetterJsName
+open external class ExternalClass {
+    <!JS_NAME_CLASH!>open fun test(x: String): String<!>
+}
+
+class MyClass : ExternalClass() {
+    val notTest: Int
+        <!JS_NAME_CLASH!>@JsName("test") get()<!> = 1
+}
+
+// FILE: OpenInheritedMethodClashedWithChildPropertySetterJsName.kt
+package OpenInheritedMethodClashedWithChildPropertySetterJsName
+open external class ExternalClass {
+    <!JS_NAME_CLASH!>open fun test(x: Int): Int<!>
+}
+
+class MyClass : ExternalClass() {
+    var notTest: Int
+    @JsName("getterTest") get() = 1
+    <!JS_NAME_CLASH!>@JsName("test") set(value)<!> { test(value) }
+}
+
+// FILE: OpenInheritedMethodClashedWithOtherInheritedMethod.kt
+package OpenInheritedMethodClashedWithOtherInheritedMethod
+open external class ExternalClass {
+    open fun test(x: String): String
+}
+
+interface MyInterface {
+    @JsName("test") fun noTest(x: Int) = 1
+}
+
+class <!JS_FAKE_NAME_CLASH!>MyClass<!> : ExternalClass(), MyInterface
+
+// FILE: OpenInheritedMethodNotClashedWithAbstractMethod.kt
+package OpenInheritedMethodNotClashedWithAbstractMethod
+open external class ExternalClass {
+    open fun test(): String
+}
+
+interface MyInterface {
+    fun test(): String
+}
+
+class MyClass : ExternalClass(), MyInterface
+
+// FILE: OpenInheritedMethodNotClashedWithExternalAbstractMethod.kt
+package OpenInheritedMethodNotClashedWithExternalAbstractMethod
+open external class ExternalClass {
+    open fun test(): String
+}
+
+external interface MyInterface {
+    fun test(): String
+}
+
+class MyClass : ExternalClass(), MyInterface
+
+// FILE: OpenInheritedMethodNotClashedWithAbstractMethodWithSameName.kt
+package OpenInheritedMethodNotClashedWithAbstractMethodWithSameName
+open external class ExternalClass {
+    open fun test(x: Int): Int
+}
+
+interface MyInterface {
+    @JsName("test") fun test(x: Int): Int
+}
+
+class MyClass : ExternalClass(), MyInterface

compiler/testData/diagnostics/testsWithJsStdLib/name/externalClassInheritance.txt

@@ -0,0 +1,396 @@
+package
+
+package FinalExternalClass {
+
+    public final external class ExternalClass {
+        public constructor ExternalClass()
+        @kotlin.js.JsName(name = "test") public final val notTest: kotlin.String
+        public final val test: kotlin.String
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        @kotlin.js.JsName(name = "test") public final fun notTest(): kotlin.String
+        public final fun test(): kotlin.String
+        public final fun test(/*0*/ vararg x: kotlin.Any /*kotlin.Array<out kotlin.Any>*/): kotlin.String
+        public final fun test(/*0*/ x: kotlin.Int): kotlin.String
+        public final fun test(/*0*/ x: kotlin.String): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+package OpenExternalClassWithFinalMethods {
+
+    public open external class ExternalClass {
+        public constructor ExternalClass()
+        @kotlin.js.JsName(name = "test") public final val notTest: kotlin.String
+        public final val test: kotlin.String
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        @kotlin.js.JsName(name = "test") public final fun notTest(): kotlin.String
+        public final fun test(): kotlin.String
+        public final fun test(/*0*/ vararg x: kotlin.Any /*kotlin.Array<out kotlin.Any>*/): kotlin.String
+        public final fun test(/*0*/ x: kotlin.Int): kotlin.String
+        public final fun test(/*0*/ x: kotlin.String): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public final class MyClass1 : OpenExternalClassWithFinalMethods.ExternalClass {
+        public constructor MyClass1()
+        @kotlin.js.JsName(name = "test") public final override /*1*/ /*fake_override*/ val notTest: kotlin.String
+        public final override /*1*/ /*fake_override*/ val test: kotlin.String
+        public final val kotlin.Int.test: kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        @kotlin.js.JsName(name = "test") public final override /*1*/ /*fake_override*/ fun notTest(): kotlin.String
+        @kotlin.js.JsName(name = "test") public final fun notTest2(): kotlin.Unit
+        public final override /*1*/ /*fake_override*/ fun test(): kotlin.String
+        public final override /*1*/ /*fake_override*/ fun test(/*0*/ vararg x: kotlin.Any /*kotlin.Array<out kotlin.Any>*/): kotlin.String
+        public final override /*1*/ /*fake_override*/ fun test(/*0*/ x: kotlin.Int): kotlin.String
+        public final fun test(/*0*/ vararg x: kotlin.Int /*kotlin.IntArray*/): kotlin.IntArray
+        public final override /*1*/ /*fake_override*/ fun test(/*0*/ x: kotlin.String): kotlin.String
+        public final fun test(/*0*/ x: kotlin.collections.List<kotlin.Int>): kotlin.collections.List<kotlin.Int>
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+        public final fun kotlin.Int.test(): kotlin.Unit
+    }
+
+    public final class MyClass2 : OpenExternalClassWithFinalMethods.ExternalClass {
+        public constructor MyClass2()
+        @kotlin.js.JsName(name = "test") public final override /*1*/ /*fake_override*/ val notTest: kotlin.String
+        @kotlin.js.JsName(name = "test") public final val notTest2: kotlin.Int = 1
+        public final override /*1*/ /*fake_override*/ val test: kotlin.String
+        public final val kotlin.Int.test: kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        @kotlin.js.JsName(name = "test") public final override /*1*/ /*fake_override*/ fun notTest(): kotlin.String
+        public final override /*1*/ /*fake_override*/ fun test(): kotlin.String
+        public final override /*1*/ /*fake_override*/ fun test(/*0*/ vararg x: kotlin.Any /*kotlin.Array<out kotlin.Any>*/): kotlin.String
+        public final override /*1*/ /*fake_override*/ fun test(/*0*/ x: kotlin.Int): kotlin.String
+        public final fun test(/*0*/ vararg x: kotlin.Int /*kotlin.IntArray*/): kotlin.IntArray
+        public final override /*1*/ /*fake_override*/ fun test(/*0*/ x: kotlin.String): kotlin.String
+        public final fun test(/*0*/ x: kotlin.collections.List<kotlin.Int>): kotlin.collections.List<kotlin.Int>
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+        public final fun kotlin.Int.test(): kotlin.Unit
+    }
+}
+
+package OpenExternalClassWithOpenMethods {
+
+    public open external class ExternalClass {
+        public constructor ExternalClass()
+        @kotlin.js.JsName(name = "test") public open val notTest: kotlin.String
+        public open val test: kotlin.String
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        @kotlin.js.JsName(name = "test") public open fun notTest(): kotlin.String
+        public open fun test(): kotlin.String
+        public open fun test(/*0*/ vararg x: kotlin.Any /*kotlin.Array<out kotlin.Any>*/): kotlin.String
+        public open fun test(/*0*/ x: kotlin.Int): kotlin.String
+        public open fun test(/*0*/ x: kotlin.String): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public final class MyClass : OpenExternalClassWithOpenMethods.ExternalClass {
+        public constructor MyClass()
+        @kotlin.js.JsName(name = "test") public open override /*1*/ /*fake_override*/ val notTest: kotlin.String
+        public open override /*1*/ /*fake_override*/ val test: kotlin.String
+        public final val kotlin.Int.test: kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        @kotlin.js.JsName(name = "test") public open override /*1*/ /*fake_override*/ fun notTest(): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun test(): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun test(/*0*/ vararg x: kotlin.Any /*kotlin.Array<out kotlin.Any>*/): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun test(/*0*/ x: kotlin.Int): kotlin.String
+        public final fun test(/*0*/ vararg x: kotlin.Int /*kotlin.IntArray*/): kotlin.IntArray
+        public open override /*1*/ /*fake_override*/ fun test(/*0*/ x: kotlin.String): kotlin.String
+        public final fun test(/*0*/ x: kotlin.collections.List<kotlin.Int>): kotlin.collections.List<kotlin.Int>
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+        public final fun kotlin.Int.test(): kotlin.Unit
+    }
+}
+
+package OpenInheritedMethodClashedWithChildMethodJsName {
+
+    public open external class ExternalClass {
+        public constructor ExternalClass()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open fun test(/*0*/ x: kotlin.String): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public final class MyClass : OpenInheritedMethodClashedWithChildMethodJsName.ExternalClass {
+        public constructor MyClass()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        @kotlin.js.JsName(name = "test") public final fun notTest(/*0*/ x: kotlin.String): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun test(/*0*/ x: kotlin.String): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+package OpenInheritedMethodClashedWithChildOverload {
+
+    public open external class ExternalClass {
+        public constructor ExternalClass()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open fun test(/*0*/ x: kotlin.Int): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public final class MyClass : OpenInheritedMethodClashedWithChildOverload.ExternalClass {
+        public constructor MyClass()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public final fun test(): kotlin.Unit
+        public open override /*1*/ /*fake_override*/ fun test(/*0*/ x: kotlin.Int): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+package OpenInheritedMethodClashedWithChildOverridde {
+
+    public open external class ExternalClass {
+        public constructor ExternalClass()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open fun test(/*0*/ x: kotlin.Int): kotlin.Int
+        public open fun test(/*0*/ x: kotlin.String): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public final class MyClass : OpenInheritedMethodClashedWithChildOverridde.ExternalClass {
+        public constructor MyClass()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ fun test(/*0*/ x: kotlin.Int): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun test(/*0*/ x: kotlin.String): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+package OpenInheritedMethodClashedWithChildProperty {
+
+    public open external class ExternalClass {
+        public constructor ExternalClass()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open fun test(/*0*/ x: kotlin.Int): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public final class MyClass : OpenInheritedMethodClashedWithChildProperty.ExternalClass {
+        public constructor MyClass()
+        public final val test: kotlin.Int = 1
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun test(/*0*/ x: kotlin.Int): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+package OpenInheritedMethodClashedWithChildPropertyGetterJsName {
+
+    public open external class ExternalClass {
+        public constructor ExternalClass()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open fun test(/*0*/ x: kotlin.String): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public final class MyClass : OpenInheritedMethodClashedWithChildPropertyGetterJsName.ExternalClass {
+        public constructor MyClass()
+        @get:kotlin.js.JsName(name = "test") public final val notTest: kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun test(/*0*/ x: kotlin.String): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+package OpenInheritedMethodClashedWithChildPropertyJsName {
+
+    public open external class ExternalClass {
+        public constructor ExternalClass()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open fun test(/*0*/ x: kotlin.String): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public final class MyClass : OpenInheritedMethodClashedWithChildPropertyJsName.ExternalClass {
+        public constructor MyClass()
+        @kotlin.js.JsName(name = "test") public final val notTest: kotlin.Int = 1
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun test(/*0*/ x: kotlin.String): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+package OpenInheritedMethodClashedWithChildPropertyOverridde {
+
+    public open external class ExternalClass {
+        public constructor ExternalClass()
+        public open val test: kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open fun test(/*0*/ x: kotlin.String): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public final class MyClass : OpenInheritedMethodClashedWithChildPropertyOverridde.ExternalClass {
+        public constructor MyClass()
+        public open override /*1*/ val test: kotlin.Int = 1
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun test(/*0*/ x: kotlin.String): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+package OpenInheritedMethodClashedWithChildPropertySetterJsName {
+
+    public open external class ExternalClass {
+        public constructor ExternalClass()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open fun test(/*0*/ x: kotlin.Int): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public final class MyClass : OpenInheritedMethodClashedWithChildPropertySetterJsName.ExternalClass {
+        public constructor MyClass()
+        @get:kotlin.js.JsName(name = "getterTest") @set:kotlin.js.JsName(name = "test") public final var notTest: kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun test(/*0*/ x: kotlin.Int): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+package OpenInheritedMethodClashedWithOtherInheritedMethod {
+
+    public open external class ExternalClass {
+        public constructor ExternalClass()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open fun test(/*0*/ x: kotlin.String): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public final class MyClass : OpenInheritedMethodClashedWithOtherInheritedMethod.ExternalClass, OpenInheritedMethodClashedWithOtherInheritedMethod.MyInterface {
+        public constructor MyClass()
+        public open override /*2*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*2*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        @kotlin.js.JsName(name = "test") public open override /*1*/ /*fake_override*/ fun noTest(/*0*/ x: kotlin.Int): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun test(/*0*/ x: kotlin.String): kotlin.String
+        public open override /*2*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public interface MyInterface {
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        @kotlin.js.JsName(name = "test") public open fun noTest(/*0*/ x: kotlin.Int): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+package OpenInheritedMethodNotClashedWithAbstractMethod {
+
+    public open external class ExternalClass {
+        public constructor ExternalClass()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open fun test(): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public final class MyClass : OpenInheritedMethodNotClashedWithAbstractMethod.ExternalClass, OpenInheritedMethodNotClashedWithAbstractMethod.MyInterface {
+        public constructor MyClass()
+        public open override /*2*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*2*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*2*/ /*fake_override*/ fun test(): kotlin.String
+        public open override /*2*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public interface MyInterface {
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public abstract fun test(): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+package OpenInheritedMethodNotClashedWithAbstractMethodWithSameName {
+
+    public open external class ExternalClass {
+        public constructor ExternalClass()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open fun test(/*0*/ x: kotlin.Int): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public final class MyClass : OpenInheritedMethodNotClashedWithAbstractMethodWithSameName.ExternalClass, OpenInheritedMethodNotClashedWithAbstractMethodWithSameName.MyInterface {
+        public constructor MyClass()
+        public open override /*2*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*2*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*2*/ /*fake_override*/ fun test(/*0*/ x: kotlin.Int): kotlin.Int
+        public open override /*2*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public interface MyInterface {
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        @kotlin.js.JsName(name = "test") public abstract fun test(/*0*/ x: kotlin.Int): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+package OpenInheritedMethodNotClashedWithExternalAbstractMethod {
+
+    public open external class ExternalClass {
+        public constructor ExternalClass()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open fun test(): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public final class MyClass : OpenInheritedMethodNotClashedWithExternalAbstractMethod.ExternalClass, OpenInheritedMethodNotClashedWithExternalAbstractMethod.MyInterface {
+        public constructor MyClass()
+        public open override /*2*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*2*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*2*/ /*fake_override*/ fun test(): kotlin.String
+        public open override /*2*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public external interface MyInterface {
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public abstract fun test(): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+package OpenInheritedPropertyClashedWithChildMethod {
+
+    public open external class ExternalClass {
+        public constructor ExternalClass()
+        public open val test: kotlin.String
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    public final class MyClass : OpenInheritedPropertyClashedWithChildMethod.ExternalClass {
+        public constructor MyClass()
+        public open override /*1*/ /*fake_override*/ val test: kotlin.String
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public final fun test(): kotlin.Unit
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+

compiler/testData/diagnostics/testsWithJsStdLib/name/topLevelDeclarations.kt

@@ -0,0 +1,171 @@
+// FIR_IDENTICAL
+
+// FILE: DeclarationOverloads.kt
+package DeclarationOverloads
+
+<!JS_NAME_CLASH!>fun test()<!> {}
+fun test(x: Int) = x
+fun test(x: String) = x
+fun test(x: String?) = x
+fun test(vararg x: Any) = x
+
+@Suppress("NOTHING_TO_INLINE")
+inline fun <reified T> test() {}
+
+<!JS_NAME_CLASH!>val test<!> = 0
+
+fun Int.test() {}
+fun Int.test(x: Int)  = x
+
+fun String.test() {}
+fun String.test(x: String)  = x
+
+val Int.test
+    get() = 0
+
+var String.test
+    get() = ""
+    set(value) { test(value) }
+
+
+// FILE: ClashJsNamedFunctionWithOtherFunction.kt
+package ClashJsNamedFunctionWithOtherFunction
+
+<!JS_NAME_CLASH!>@JsName("test") fun noTest(x: String): String<!> = x
+
+<!JS_NAME_CLASH!>fun test()<!> {}
+
+// FILE: ClashJsNamedFunctionWithOtherProperty.kt
+package ClashJsNamedFunctionWithOtherProperty
+
+<!JS_NAME_CLASH!>@JsName("test") fun noTest(x: String): String<!> = x
+
+<!JS_NAME_CLASH!>val test<!> = 1
+
+// FILE: ClashJsNamedPropertyWithOtherFunction.kt
+package ClashJsNamedPropertyWithOtherFunction
+
+<!JS_NAME_CLASH!>fun test()<!> {}
+
+<!JS_NAME_CLASH!>@JsName("test") val notTest<!> = 1
+
+// FILE: ClashJsNamedPropertyGetterWithOtherFunction.kt
+package ClashJsNamedPropertyGetterWithOtherFunction
+
+<!JS_NAME_CLASH!>fun test()<!> {}
+
+val notTest: Int
+    <!JS_NAME_CLASH!>@JsName("test") get()<!> = 1
+
+// FILE: ClashJsNamedPropertySetterWithOtherFunction.kt
+package ClashJsNamedPropertySetterWithOtherFunction
+
+<!JS_NAME_CLASH!>fun test()<!> {}
+
+fun <T> ignore(x: T) = x
+
+var notTest: Int
+    @JsName("getterTest") get() = 1
+    <!JS_NAME_CLASH!>@JsName("test") set(value)<!> { ignore(value) }
+
+// FILE: FunctionAndInterfaceClash.kt
+package FunctionAndInterfaceClash
+
+<!JS_NAME_CLASH!>fun test()<!> {}
+
+interface <!JS_NAME_CLASH!>test<!>
+
+// FILE: FunctionWithParamsAndInterfaceNoClash.kt
+package FunctionWithParamsAndInterfaceNoClash
+
+fun test(x: Int) = x
+@Suppress("NOTHING_TO_INLINE")
+inline fun <reified T> test() {}
+
+interface test
+
+// FILE: FunctionWithJsNameAndInterfaceClash.kt
+package FunctionWithJsNameAndInterfaceClash
+
+<!JS_NAME_CLASH!>@JsName("test") fun notTest(x: Int)<!> = x
+
+interface <!JS_NAME_CLASH!>test<!>
+
+// FILE: FunctionWithJsNameAndObjectClash.kt
+package FunctionWithJsNameAndObjectClash
+
+<!JS_NAME_CLASH!>@JsName("test") fun notTest(x: Int)<!> = x
+
+<!JS_NAME_CLASH!>object test<!>
+
+// FILE: FunctionWithJsNameAndClassClash.kt
+package FunctionWithJsNameAndClassClash
+
+<!JS_NAME_CLASH!>@JsName("test") fun notTest(x: Int)<!> = x
+
+class <!JS_NAME_CLASH!>test<!>
+
+// FILE: FunctionAndInterfaceWithJsNameClash.kt
+package FunctionAndInterfaceWithJsNameClash
+
+<!JS_NAME_CLASH!>fun test()<!> {}
+
+@JsName("test") interface <!JS_NAME_CLASH!>NotTest<!>
+
+// FILE: FunctionAndClassWithJsNameClash.kt
+package FunctionAndClassWithJsNameClash
+
+<!JS_NAME_CLASH!>fun test()<!> {}
+
+@JsName("test") class <!JS_NAME_CLASH!>NotTest<!>
+
+// FILE: FunctionAndObjectWithJsNameClash.kt
+package FunctionAndObjectWithJsNameClash
+
+<!JS_NAME_CLASH!>fun test()<!> {}
+
+@JsName("test") <!JS_NAME_CLASH!>object NotTest<!>
+
+// FILE: PropertyWithJsNameAndInterfaceClash.kt
+package PropertyWithJsNameAndInterfaceClash
+
+<!JS_NAME_CLASH!>@JsName("test") val notTest<!> = 1
+
+interface <!JS_NAME_CLASH!>test<!>
+
+// FILE: FunctionWithJsNameAndExternalDeclarationsNoClash.kt
+package FunctionWithJsNameAndExternalDeclarationsNoClash
+
+@JsName("test")
+fun notTest1(x: Int) = x
+
+external fun test(): Int
+external fun test(x: String): Int
+external val test: Int
+
+@JsName("test")
+external fun NotTest2(x: Int): Int
+
+@JsName("test")
+external val NotTest3: Int
+
+@JsName("test")
+external interface NotTest4
+
+@JsName("test")
+external class NotTest5
+
+@JsName("test")
+external abstract class NotTest6
+
+@JsName("test")
+external open class NotTest7
+
+@JsName("test")
+external private class NotTest8
+
+@JsName("test")
+external internal class NotTest9
+
+@JsName("test")
+external object NotTest10

compiler/testData/diagnostics/testsWithJsStdLib/name/topLevelDeclarations.txt

@@ -0,0 +1,196 @@
+package
+
+package ClashJsNamedFunctionWithOtherFunction {
+    @kotlin.js.JsName(name = "test") public fun noTest(/*0*/ x: kotlin.String): kotlin.String
+    public fun test(): kotlin.Unit
+}
+
+package ClashJsNamedFunctionWithOtherProperty {
+    public val test: kotlin.Int = 1
+    @kotlin.js.JsName(name = "test") public fun noTest(/*0*/ x: kotlin.String): kotlin.String
+}
+
+package ClashJsNamedPropertyGetterWithOtherFunction {
+    @get:kotlin.js.JsName(name = "test") public val notTest: kotlin.Int
+    public fun test(): kotlin.Unit
+}
+
+package ClashJsNamedPropertySetterWithOtherFunction {
+    @get:kotlin.js.JsName(name = "getterTest") @set:kotlin.js.JsName(name = "test") public var notTest: kotlin.Int
+    public fun </*0*/ T> ignore(/*0*/ x: T): T
+    public fun test(): kotlin.Unit
+}
+
+package ClashJsNamedPropertyWithOtherFunction {
+    @kotlin.js.JsName(name = "test") public val notTest: kotlin.Int = 1
+    public fun test(): kotlin.Unit
+}
+
+package DeclarationOverloads {
+    public val test: kotlin.Int = 0
+    public val kotlin.Int.test: kotlin.Int
+    public var kotlin.String.test: kotlin.String
+    public fun test(): kotlin.Unit
+    @kotlin.Suppress(names = {"NOTHING_TO_INLINE"}) public inline fun </*0*/ reified T> test(): kotlin.Unit
+    public fun test(/*0*/ vararg x: kotlin.Any /*kotlin.Array<out kotlin.Any>*/): kotlin.Array<out kotlin.Any>
+    public fun test(/*0*/ x: kotlin.Int): kotlin.Int
+    public fun test(/*0*/ x: kotlin.String): kotlin.String
+    public fun test(/*0*/ x: kotlin.String?): kotlin.String?
+    public fun kotlin.Int.test(): kotlin.Unit
+    public fun kotlin.Int.test(/*0*/ x: kotlin.Int): kotlin.Int
+    public fun kotlin.String.test(): kotlin.Unit
+    public fun kotlin.String.test(/*0*/ x: kotlin.String): kotlin.String
+}
+
+package FunctionAndClassWithJsNameClash {
+    public fun test(): kotlin.Unit
+
+    @kotlin.js.JsName(name = "test") public final class NotTest {
+        public constructor NotTest()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+package FunctionAndInterfaceClash {
+    public fun test(): kotlin.Unit
+
+    public interface test {
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+package FunctionAndInterfaceWithJsNameClash {
+    public fun test(): kotlin.Unit
+
+    @kotlin.js.JsName(name = "test") public interface NotTest {
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+package FunctionAndObjectWithJsNameClash {
+    public fun test(): kotlin.Unit
+
+    @kotlin.js.JsName(name = "test") public object NotTest {
+        private constructor NotTest()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+package FunctionWithJsNameAndClassClash {
+    @kotlin.js.JsName(name = "test") public fun notTest(/*0*/ x: kotlin.Int): kotlin.Int
+
+    public final class test {
+        public constructor test()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+package FunctionWithJsNameAndExternalDeclarationsNoClash {
+    @kotlin.js.JsName(name = "test") public external val NotTest3: kotlin.Int
+    public external val test: kotlin.Int
+    @kotlin.js.JsName(name = "test") public external fun NotTest2(/*0*/ x: kotlin.Int): kotlin.Int
+    @kotlin.js.JsName(name = "test") public fun notTest1(/*0*/ x: kotlin.Int): kotlin.Int
+    public external fun test(): kotlin.Int
+    public external fun test(/*0*/ x: kotlin.String): kotlin.Int
+
+    @kotlin.js.JsName(name = "test") public external object NotTest10 {
+        private constructor NotTest10()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    @kotlin.js.JsName(name = "test") public external interface NotTest4 {
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    @kotlin.js.JsName(name = "test") public final external class NotTest5 {
+        public constructor NotTest5()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    @kotlin.js.JsName(name = "test") public abstract external class NotTest6 {
+        public constructor NotTest6()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    @kotlin.js.JsName(name = "test") public open external class NotTest7 {
+        public constructor NotTest7()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    @kotlin.js.JsName(name = "test") private final external class NotTest8 {
+        public constructor NotTest8()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+
+    @kotlin.js.JsName(name = "test") internal final external class NotTest9 {
+        public constructor NotTest9()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+package FunctionWithJsNameAndInterfaceClash {
+    @kotlin.js.JsName(name = "test") public fun notTest(/*0*/ x: kotlin.Int): kotlin.Int
+
+    public interface test {
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+package FunctionWithJsNameAndObjectClash {
+    @kotlin.js.JsName(name = "test") public fun notTest(/*0*/ x: kotlin.Int): kotlin.Int
+
+    public object test {
+        private constructor test()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+package FunctionWithParamsAndInterfaceNoClash {
+    @kotlin.Suppress(names = {"NOTHING_TO_INLINE"}) public inline fun </*0*/ reified T> test(): kotlin.Unit
+    public fun test(/*0*/ x: kotlin.Int): kotlin.Int
+
+    public interface test {
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+package PropertyWithJsNameAndInterfaceClash {
+    @kotlin.js.JsName(name = "test") public val notTest: kotlin.Int = 1
+
+    public interface test {
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+

compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/DiagnosticsTestWithJsStdLibGenerated.java

@@ -697,12 +697,30 @@ public class DiagnosticsTestWithJsStdLibGenerated extends AbstractDiagnosticsTes
             runTest("compiler/testData/diagnostics/testsWithJsStdLib/name/classAndTypealias.kt");
         }
 
+        @Test
+        @TestMetadata("classInheritance.kt")
+        public void testClassInheritance() throws Exception {
+            runTest("compiler/testData/diagnostics/testsWithJsStdLib/name/classInheritance.kt");
+        }
+
+        @Test
+        @TestMetadata("classInheritanceExtensions.kt")
+        public void testClassInheritanceExtensions() throws Exception {
+            runTest("compiler/testData/diagnostics/testsWithJsStdLib/name/classInheritanceExtensions.kt");
+        }
+
         @Test
         @TestMetadata("classLevelMethodAndProperty.kt")
         public void testClassLevelMethodAndProperty() throws Exception {
             runTest("compiler/testData/diagnostics/testsWithJsStdLib/name/classLevelMethodAndProperty.kt");
         }
 
+        @Test
+        @TestMetadata("classMembers.kt")
+        public void testClassMembers() throws Exception {
+            runTest("compiler/testData/diagnostics/testsWithJsStdLib/name/classMembers.kt");
+        }
+
         @Test
         @TestMetadata("conflictingNamesFromSuperclass.kt")
         public void testConflictingNamesFromSuperclass() throws Exception {
@@ -721,6 +739,18 @@ public class DiagnosticsTestWithJsStdLibGenerated extends AbstractDiagnosticsTes
             runTest("compiler/testData/diagnostics/testsWithJsStdLib/name/extensionPropertyAndMethod.kt");
         }
 
+        @Test
+        @TestMetadata("extensionPropertyAndMethodWithJsName.kt")
+        public void testExtensionPropertyAndMethodWithJsName() throws Exception {
+            runTest("compiler/testData/diagnostics/testsWithJsStdLib/name/extensionPropertyAndMethodWithJsName.kt");
+        }
+
+        @Test
+        @TestMetadata("externalClassInheritance.kt")
+        public void testExternalClassInheritance() throws Exception {
+            runTest("compiler/testData/diagnostics/testsWithJsStdLib/name/externalClassInheritance.kt");
+        }
+
         @Test
         @TestMetadata("illegalName.kt")
         public void testIllegalName() throws Exception {
@@ -853,6 +883,12 @@ public class DiagnosticsTestWithJsStdLibGenerated extends AbstractDiagnosticsTes
             runTest("compiler/testData/diagnostics/testsWithJsStdLib/name/propertyAndMethodInSubclass.kt");
         }
 
+        @Test
+        @TestMetadata("topLevelDeclarations.kt")
+        public void testTopLevelDeclarations() throws Exception {
+            runTest("compiler/testData/diagnostics/testsWithJsStdLib/name/topLevelDeclarations.kt");
+        }
+
         @Test
         @TestMetadata("topLevelMethodAndJsNameConstructor.kt")
         public void testTopLevelMethodAndJsNameConstructor() throws Exception {

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/fir/FirJsBoxTestGenerated.java

@@ -5178,6 +5178,12 @@ public class FirJsBoxTestGenerated extends AbstractFirJsBoxTest {
             runTest("js/js.translator/testData/box/inheritance/fromNestedNativeClass.kt");
         }
 
+        @Test
+        @TestMetadata("inheritExtensionsWithSameNames.kt")
+        public void testInheritExtensionsWithSameNames() throws Exception {
+            runTest("js/js.translator/testData/box/inheritance/inheritExtensionsWithSameNames.kt");
+        }
+
         @Test
         @TestMetadata("inheritFromCharIterator.kt")
         public void testInheritFromCharIterator() throws Exception {

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/fir/FirJsES6BoxTestGenerated.java

@@ -5284,6 +5284,12 @@ public class FirJsES6BoxTestGenerated extends AbstractFirJsES6BoxTest {
             runTest("js/js.translator/testData/box/inheritance/fromNestedNativeClass.kt");
         }
 
+        @Test
+        @TestMetadata("inheritExtensionsWithSameNames.kt")
+        public void testInheritExtensionsWithSameNames() throws Exception {
+            runTest("js/js.translator/testData/box/inheritance/inheritExtensionsWithSameNames.kt");
+        }
+
         @Test
         @TestMetadata("inheritFromCharIterator.kt")
         public void testInheritFromCharIterator() throws Exception {

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/fir/FirPsiJsOldFrontendDiagnosticsTestGenerated.java

@@ -698,12 +698,30 @@ public class FirPsiJsOldFrontendDiagnosticsTestGenerated extends AbstractFirPsiJ
             runTest("compiler/testData/diagnostics/testsWithJsStdLib/name/classAndTypealias.kt");
         }
 
+        @Test
+        @TestMetadata("classInheritance.kt")
+        public void testClassInheritance() throws Exception {
+            runTest("compiler/testData/diagnostics/testsWithJsStdLib/name/classInheritance.kt");
+        }
+
+        @Test
+        @TestMetadata("classInheritanceExtensions.kt")
+        public void testClassInheritanceExtensions() throws Exception {
+            runTest("compiler/testData/diagnostics/testsWithJsStdLib/name/classInheritanceExtensions.kt");
+        }
+
         @Test
         @TestMetadata("classLevelMethodAndProperty.kt")
         public void testClassLevelMethodAndProperty() throws Exception {
             runTest("compiler/testData/diagnostics/testsWithJsStdLib/name/classLevelMethodAndProperty.kt");
         }
 
+        @Test
+        @TestMetadata("classMembers.kt")
+        public void testClassMembers() throws Exception {
+            runTest("compiler/testData/diagnostics/testsWithJsStdLib/name/classMembers.kt");
+        }
+
         @Test
         @TestMetadata("conflictingNamesFromSuperclass.kt")
         public void testConflictingNamesFromSuperclass() throws Exception {
@@ -722,6 +740,18 @@ public class FirPsiJsOldFrontendDiagnosticsTestGenerated extends AbstractFirPsiJ
             runTest("compiler/testData/diagnostics/testsWithJsStdLib/name/extensionPropertyAndMethod.kt");
         }
 
+        @Test
+        @TestMetadata("extensionPropertyAndMethodWithJsName.kt")
+        public void testExtensionPropertyAndMethodWithJsName() throws Exception {
+            runTest("compiler/testData/diagnostics/testsWithJsStdLib/name/extensionPropertyAndMethodWithJsName.kt");
+        }
+
+        @Test
+        @TestMetadata("externalClassInheritance.kt")
+        public void testExternalClassInheritance() throws Exception {
+            runTest("compiler/testData/diagnostics/testsWithJsStdLib/name/externalClassInheritance.kt");
+        }
+
         @Test
         @TestMetadata("illegalName.kt")
         public void testIllegalName() throws Exception {
@@ -854,6 +884,12 @@ public class FirPsiJsOldFrontendDiagnosticsTestGenerated extends AbstractFirPsiJ
             runTest("compiler/testData/diagnostics/testsWithJsStdLib/name/propertyAndMethodInSubclass.kt");
         }
 
+        @Test
+        @TestMetadata("topLevelDeclarations.kt")
+        public void testTopLevelDeclarations() throws Exception {
+            runTest("compiler/testData/diagnostics/testsWithJsStdLib/name/topLevelDeclarations.kt");
+        }
+
         @Test
         @TestMetadata("topLevelMethodAndJsNameConstructor.kt")
         public void testTopLevelMethodAndJsNameConstructor() throws Exception {

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/ir/IrBoxJsES6TestGenerated.java

@@ -5284,6 +5284,12 @@ public class IrBoxJsES6TestGenerated extends AbstractIrBoxJsES6Test {
             runTest("js/js.translator/testData/box/inheritance/fromNestedNativeClass.kt");
         }
 
+        @Test
+        @TestMetadata("inheritExtensionsWithSameNames.kt")
+        public void testInheritExtensionsWithSameNames() throws Exception {
+            runTest("js/js.translator/testData/box/inheritance/inheritExtensionsWithSameNames.kt");
+        }
+
         @Test
         @TestMetadata("inheritFromCharIterator.kt")
         public void testInheritFromCharIterator() throws Exception {

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/ir/IrBoxJsTestGenerated.java

@@ -5178,6 +5178,12 @@ public class IrBoxJsTestGenerated extends AbstractIrBoxJsTest {
             runTest("js/js.translator/testData/box/inheritance/fromNestedNativeClass.kt");
         }
 
+        @Test
+        @TestMetadata("inheritExtensionsWithSameNames.kt")
+        public void testInheritExtensionsWithSameNames() throws Exception {
+            runTest("js/js.translator/testData/box/inheritance/inheritExtensionsWithSameNames.kt");
+        }
+
         @Test
         @TestMetadata("inheritFromCharIterator.kt")
         public void testInheritFromCharIterator() throws Exception {

js/js.translator/testData/box/inheritance/inheritExtensionsWithSameNames.kt

@@ -0,0 +1,17 @@
+open class Class {
+    fun String.test(): String = "O"
+    val String.test: String
+        get() = "K"
+}
+
+// This case is only relevant for the JS Legacy BE and is not applicable to the JS IR backend,
+// as the IR BE can resolve such name collisions.
+@Suppress("JS_FAKE_NAME_CLASH")
+class MyClass1 : Class()
+
+fun box(): String {
+    val s = ""
+    return with(MyClass1()) {
+        s.test() + s.test
+    }
+}