JS: serialize type of local anonymous class as its denotable supertype. See KT-14888

compiler/testData/diagnostics/testsWithJsStdLib/localClassMetadata.kt

@@ -0,0 +1,51 @@
+// MODULE: lib
+// FILE: lib.kt
+
+interface I {
+    fun foo(): String
+}
+
+abstract class A {
+    abstract fun bar(): String
+}
+
+abstract class G<T> {
+    abstract fun baz(): T
+}
+
+class C {
+    private val propA = object : A() {
+        override fun bar() = "propA.bar"
+
+        fun x() = "OK"
+    }
+
+    private val propI = object : I {
+        override fun foo() = "propI.foo"
+
+        fun x() = "OK"
+    }
+
+    private val propAI = object : A(), I {
+        override fun foo() = "propAI.foo"
+
+        override fun bar() = "propAI.bar"
+
+        fun x() = "OK"
+    }
+
+    private val propG = object : G<String>() {
+        override fun baz() = "propG.baz"
+
+        fun x() = "OK"
+    }
+}
+
+// MODULE: main(lib)
+// FILE: main.kt
+fun test() {
+    println(C().<!INVISIBLE_MEMBER!>propA<!>.x())
+    println(C().<!INVISIBLE_MEMBER!>propI<!>.x())
+    println(C().<!INVISIBLE_MEMBER!>propAI<!>.x())
+    println(C().<!INVISIBLE_MEMBER!>propG<!>.x())
+}

compiler/testData/diagnostics/testsWithJsStdLib/localClassMetadata.txt

@@ -0,0 +1,42 @@
+// -- Module: <lib> --
+package
+
+public abstract class A {
+    public constructor A()
+    public abstract fun bar(): 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 C {
+    public constructor C()
+    private final val propA: C.propA.<no name provided>
+    private final val propAI: C.propAI.<no name provided>
+    private final val propG: C.propG.<no name provided>
+    private final val propI: C.propI.<no name provided>
+    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 abstract class G</*0*/ T> {
+    public constructor G</*0*/ T>()
+    public abstract fun baz(): T
+    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 interface I {
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public abstract fun foo(): kotlin.String
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+
+// -- Module: <main> --
+package
+
+public fun test(): kotlin.Unit