== turned into a safe-call

compiler/testData/diagnostics/tests/delegatedProperty/absentErrorAboutInitializer.kt

@@ -1,8 +1,9 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
 val a: Int by Delegate()
 
 class Delegate {
   fun get(t: Any?, p: PropertyMetadata): Int {
-    t.equals(p) // to avoid UNUSED_PARAMETER warning
     return 1
   }
 }

compiler/testData/diagnostics/tests/delegatedProperty/absentErrorAboutType.kt

@@ -1,8 +1,9 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
 val a by Delegate()
 
 class Delegate {
   fun get(t: Any?, p: PropertyMetadata): Int {
-    t.equals(p) // to avoid UNUSED_PARAMETER warning
     return 1
   }
 }

compiler/testData/diagnostics/tests/delegatedProperty/abstractDelegatedProperty.kt

@@ -1,10 +1,11 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
 abstract class A {
     abstract val a: Int <!ABSTRACT_DELEGATED_PROPERTY!>by Delegate()<!>
 }
 
 class Delegate {
   fun get(t: Any?, p: PropertyMetadata): Int {
-    t.equals(p) // to avoid UNUSED_PARAMETER warning
     return 1
   }
 }

compiler/testData/diagnostics/tests/delegatedProperty/backingField.kt

@@ -1,3 +1,5 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
 class B {
     val a: Int by Delegate()
 
@@ -6,7 +8,6 @@ class B {
 
 class Delegate {
   fun get(t: Any?, p: PropertyMetadata): Int {
-    t.equals(p) // to avoid UNUSED_PARAMETER warning
     return 1
   }
 }

compiler/testData/diagnostics/tests/delegatedProperty/delegatedPropertyOverridedInTrait.kt

@@ -1,3 +1,5 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
 trait A {
     val prop: Int
 }
@@ -12,7 +14,6 @@ fun foo() {
 
 class Delegate {
   fun get(t: Any?, p: PropertyMetadata): Int {
-    t.equals(p) // to avoid UNUSED_PARAMETER warning
     return 1
   }
 }

compiler/testData/diagnostics/tests/delegatedProperty/delegatedPropertyOverridedInTraitTypeMismatch.kt

@@ -1,3 +1,5 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
 trait A {
     val prop: Int
 }
@@ -12,7 +14,6 @@ fun foo() {
 
 class Delegate {
     fun get(t: Any?, p: PropertyMetadata): String {
-        t.equals(p) // to avoid UNUSED_PARAMETER warning
         return ""
     }
 }

compiler/testData/diagnostics/tests/delegatedProperty/genericGetter.kt

@@ -1,8 +1,9 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
 val a: Int by A(1)
 
-class A<T: Any>(<!UNUSED_PARAMETER!>i<!>: T) {
+class A<T: Any>(i: T) {
   fun get(t: Any?, p: PropertyMetadata): T {
-    t.equals(p) // to avoid UNUSED_PARAMETER warning
     throw Exception()
   }
 }

compiler/testData/diagnostics/tests/delegatedProperty/getterWithSubtype.kt

@@ -1,3 +1,5 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
 open class Base
 class Derived: Base()
 
@@ -5,7 +7,6 @@ val a: Base by A()
 
 class A {
   fun get(t: Any?, p: PropertyMetadata): Derived {
-    t.equals(p) // to avoid UNUSED_PARAMETER warning
     return Derived()
   }
 }

compiler/testData/diagnostics/tests/delegatedProperty/inTrait.kt

@@ -1,10 +1,11 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
 trait T {
   val a: Int <!DELEGATED_PROPERTY_IN_TRAIT!>by Delegate()<!>
 }
 
 class Delegate {
   fun get(t: Any?, p: PropertyMetadata): Int {
-    t.equals(p) // to avoid UNUSED_PARAMETER warning
     return 1
   }
 }

compiler/testData/diagnostics/tests/delegatedProperty/incompleteTypeInference.kt

@@ -1,3 +1,5 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
 class A
 
 class D {
@@ -8,7 +10,6 @@ val cTopLevel: Int by <!DELEGATE_SPECIAL_FUNCTION_MISSING!>IncorrectThis<A>()<!>
 
 class IncorrectThis<T> {
     fun get<R>(t: Any?, p: PropertyMetadata): Int {
-        t.equals(p) // to avoid UNUSED_PARAMETER warning
         return 1
     }
 }

compiler/testData/diagnostics/tests/delegatedProperty/localVariable.kt

@@ -1,12 +1,13 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE
+
 class Local {
   fun foo() {
-    val <!UNUSED_VARIABLE!>a<!>: Int <!LOCAL_VARIABLE_WITH_DELEGATE!>by Delegate()<!>
+    val a: Int <!LOCAL_VARIABLE_WITH_DELEGATE!>by Delegate()<!>
   }
 }
 
 class Delegate {
   fun get(t: Any?, p: PropertyMetadata): Int {
-    t.equals(p) // to avoid UNUSED_PARAMETER warning
     return 1
   }
 }

compiler/testData/diagnostics/tests/delegatedProperty/missedSetter.kt

@@ -1,8 +1,9 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
 var a: Int by <!DELEGATE_SPECIAL_FUNCTION_MISSING!>A()<!>
 
 class A {
     fun get(t: Any?, p: PropertyMetadata): Int {
-      t.equals(p) // to avoid UNUSED_PARAMETER warning
       return 1
     }
 }

compiler/testData/diagnostics/tests/delegatedProperty/propertyDefferedType.kt

@@ -1,10 +1,9 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
 class B {
     val c by Delegate(<!UNRESOLVED_REFERENCE!>ag<!>)
 }
 
 class Delegate<T: Any>(val init: T) {
-  fun get(t: Any?, p: PropertyMetadata): Int {
-    t.equals(p) // to avoid UNUSED_PARAMETER warning
-    throw Exception()
-  }
+  fun get(t: Any?, p: PropertyMetadata): Int = null!!
 }

compiler/testData/diagnostics/tests/delegatedProperty/propertyDelegatedAmbiguity.kt

@@ -1,16 +1,13 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
 val a: Int by <!DELEGATE_SPECIAL_FUNCTION_AMBIGUITY!>Delegate()<!>
 
 class Delegate {
     fun get(t: Any?, p: PropertyMetadata): Int {
-        t.equals(p) // to avoid UNUSED_PARAMETER warning
         return 1
     }
 
-    fun propertyDelegated(p: PropertyMetadata) {
-        p.equals(p)
-    }
+    fun propertyDelegated(p: PropertyMetadata) {}
 
-    fun propertyDelegated(p: PropertyMetadata, s: String = "") {
-        p.equals(s)
-    }
+    fun propertyDelegated(p: PropertyMetadata, s: String = "") {}
 }

compiler/testData/diagnostics/tests/delegatedProperty/propertyDelegatedIncomplete.kt

@@ -1,12 +1,11 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
 val a: Int by  <!DELEGATE_PD_METHOD_NONE_APPLICABLE!>Delegate()<!>
 
 class Delegate {
     fun get(t: Any?, p: PropertyMetadata): Int {
-        t.equals(p) // to avoid UNUSED_PARAMETER warning
         return 1
     }
 
-    fun propertyDelegated<T>(p: PropertyMetadata) {
-        p.equals(p)
-    }
+    fun propertyDelegated<T>(p: PropertyMetadata) {}
 }

compiler/testData/diagnostics/tests/delegatedProperty/propertyDelegatedMissing.kt

@@ -1,8 +1,9 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
 val a: Int by Delegate()
 
 class Delegate {
     fun get(t: Any?, p: PropertyMetadata): Int {
-        t.equals(p) // to avoid UNUSED_PARAMETER warning
         return 1
     }
 }

compiler/testData/diagnostics/tests/delegatedProperty/propertyDelegatedPrivate.kt

@@ -1,12 +1,11 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
 val a: Int by <!DELEGATE_PD_METHOD_NONE_APPLICABLE!>Delegate()<!>
 
 class Delegate {
     fun get(t: Any?, p: PropertyMetadata): Int {
-        t.equals(p) // to avoid UNUSED_PARAMETER warning
         return 1
     }
 
-    private fun propertyDelegated(p: PropertyMetadata) {
-        p.equals(p)
-    }
+    private fun propertyDelegated(p: PropertyMetadata) {}
 }

compiler/testData/diagnostics/tests/delegatedProperty/propertyDelegatedWrongArguments.kt

@@ -1,22 +1,17 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
 val a: Int by <!DELEGATE_PD_METHOD_NONE_APPLICABLE!>Delegate()<!>
 
 class Delegate {
     fun get(t: Any?, p: PropertyMetadata): Int {
-        t.equals(p) // to avoid UNUSED_PARAMETER warning
         return 1
     }
 
     fun propertyDelegated() {}
 
-    fun propertyDelegated(a: Int) {
-        a.equals(a)
-    }
+    fun propertyDelegated(a: Int) {}
 
-    fun propertyDelegated(a: String) {
-        a.equals(a)
-    }
+    fun propertyDelegated(a: String) {}
 
-    fun propertyDelegated(p: PropertyMetadata, a: Int) {
-        p.equals(a)
-    }
+    fun propertyDelegated(p: PropertyMetadata, a: Int) {}
 }

compiler/testData/diagnostics/tests/delegatedProperty/publicDelegatedProperty.kt

@@ -1,8 +1,9 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
 <!PUBLIC_MEMBER_SHOULD_SPECIFY_TYPE!>public val a<!> by Delegate()
 
 class Delegate {
   fun get(t: Any?, p: PropertyMetadata): Int {
-    t.equals(p) // to avoid UNUSED_PARAMETER warning
     return 1
   }
 }

compiler/testData/diagnostics/tests/delegatedProperty/recursiveType.kt

@@ -1,3 +1,5 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
 val a by <!TYPECHECKER_HAS_RUN_INTO_RECURSIVE_PROBLEM!>a<!>
 
 val b by Delegate(<!TYPECHECKER_HAS_RUN_INTO_RECURSIVE_PROBLEM!>b<!>)
@@ -5,9 +7,8 @@ val b by Delegate(<!TYPECHECKER_HAS_RUN_INTO_RECURSIVE_PROBLEM!>b<!>)
 val c by <!DEBUG_INFO_ELEMENT_WITH_ERROR_TYPE!>d<!>
 val d by <!TYPECHECKER_HAS_RUN_INTO_RECURSIVE_PROBLEM!>c<!>
 
-class Delegate(<!UNUSED_PARAMETER!>i<!>: Int) {
+class Delegate(i: Int) {
   fun get(t: Any?, p: PropertyMetadata): Int {
-    t.equals(p) // to avoid UNUSED_PARAMETER warning
     return 1
   }
 }

compiler/testData/diagnostics/tests/delegatedProperty/redundantGetter.kt

@@ -1,9 +1,10 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
 val a: Int by Delegate()
   <!ACCESSOR_FOR_DELEGATED_PROPERTY!>get() = 1<!>
 
 class Delegate {
   fun get(t: Any?, p: PropertyMetadata): Int {
-    t.equals(p) // to avoid UNUSED_PARAMETER warning
     return 1
   }
 }

compiler/testData/diagnostics/tests/delegatedProperty/redundantSetter.kt

@@ -1,14 +1,13 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
 var a: Int by Delegate()
   <!ACCESSOR_FOR_DELEGATED_PROPERTY!>get() = 1<!>
   <!ACCESSOR_FOR_DELEGATED_PROPERTY!>set(i) {}<!>
 
 class Delegate {
   fun get(t: Any?, p: PropertyMetadata): Int {
-    t.equals(p) // to avoid UNUSED_PARAMETER warning
     return 1
   }
 
-  fun set(t: Any?, p: PropertyMetadata, i: Int) {
-    t.equals(p) || i.equals(null)  // to avoid UNUSED_PARAMETER warning
-  }
+  fun set(t: Any?, p: PropertyMetadata, i: Int) {}
 }

compiler/testData/diagnostics/tests/delegatedProperty/setterThisTypeMismatch.kt

@@ -1,3 +1,5 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
 class D {
   var c: Int by <!DELEGATE_SPECIAL_FUNCTION_NONE_APPLICABLE!>Delegate()<!>
 }
@@ -8,11 +10,7 @@ class A
 
 class Delegate {
   fun get(t: Any?, p: PropertyMetadata): Int {
-    t.equals(p) // to avoid UNUSED_PARAMETER warning
     return 1
   }
-  fun set(t: A, p: PropertyMetadata, i: Int) {
-    t.equals(p) // to avoid UNUSED_PARAMETER warning
-    i.equals(null)
-  }
+  fun set(t: A, p: PropertyMetadata, i: Int) {}
 }

compiler/testData/diagnostics/tests/delegatedProperty/setterWithSupertype.kt

@@ -1,3 +1,5 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
 open class Base
 class Derived: Base()
 
@@ -5,13 +7,9 @@ var a: Derived by A()
 
 class A {
   fun get(t: Any?, p: PropertyMetadata): Derived {
-    t.equals(p) // to avoid UNUSED_PARAMETER warning
     return Derived()
   }
 
-  fun set(t: Any?, p: PropertyMetadata, i: Base) {
-    t.equals(p) // to avoid UNUSED_PARAMETER warning
-    i.equals(null) // to avoid UNUSED_PARAMETER warning
-  }
+  fun set(t: Any?, p: PropertyMetadata, i: Base) {}
 }
 

compiler/testData/diagnostics/tests/delegatedProperty/thisInDelegate.kt

@@ -1,12 +1,13 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
 val Int.a by Delegate(<!NO_THIS!>this<!>)
 
 class A {
   val Int.a by Delegate(<!TYPE_MISMATCH!>this<!>)
 }
 
-class Delegate(<!UNUSED_PARAMETER!>i<!>: Int) {
+class Delegate(i: Int) {
   fun get(t: Any?, p: PropertyMetadata): Int {
-    t.equals(p) // to avoid UNUSED_PARAMETER warning
     return 1
   }
 }

compiler/testData/diagnostics/tests/delegatedProperty/thisOfAnyType.kt

@@ -1,3 +1,5 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
 class A {
   var a: Int by Delegate()
 }
@@ -6,11 +8,7 @@ var aTopLevel: Int by Delegate()
 
 class Delegate {
   fun get(t: Any?, p: PropertyMetadata): Int {
-    t.equals(p) // to avoid UNUSED_PARAMETER warning
     return 1
   }
-  fun set(t: Any?, p: PropertyMetadata, a: Int) {
-    t.equals(p) // to avoid UNUSED_PARAMETER warning
-    a.equals(null)
-  }
+  fun set(t: Any?, p: PropertyMetadata, a: Int) {}
 }

compiler/testData/diagnostics/tests/delegatedProperty/typeMismatchForGetReturnType.kt

@@ -1,8 +1,9 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
 val c: Int by <!DELEGATE_SPECIAL_FUNCTION_RETURN_TYPE_MISMATCH!>Delegate()<!>
 
 class Delegate {
   fun get(t: Any?, p: PropertyMetadata): String {
-    t.equals(p) // to avoid UNUSED_PARAMETER warning
     return ""
   }
 }

compiler/testData/diagnostics/tests/delegatedProperty/typeMismatchForSetParameter.kt

@@ -1,3 +1,5 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
 class A {
   var a: Int by <!DELEGATE_SPECIAL_FUNCTION_NONE_APPLICABLE!>Delegate()<!>
 }
@@ -6,11 +8,7 @@ var aTopLevel: Int by <!DELEGATE_SPECIAL_FUNCTION_NONE_APPLICABLE!>Delegate()<!>
 
 class Delegate {
   fun get(t: Any?, p: PropertyMetadata): Int {
-    t.equals(p) // to avoid UNUSED_PARAMETER warning
     return 1
   }
-  fun set(t: Any?, p: PropertyMetadata, i: String) {
-    t.equals(p) // to avoid UNUSED_PARAMETER warning
-    i.equals(null)
-  }
+  fun set(t: Any?, p: PropertyMetadata, i: String) {}
 }

compiler/testData/diagnostics/tests/delegatedProperty/wrongCountOfParametersInGet.kt

@@ -1,3 +1,5 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
 class A {
   val a: Int by <!DELEGATE_SPECIAL_FUNCTION_NONE_APPLICABLE!>Delegate()<!>
 }
@@ -6,7 +8,6 @@ val aTopLevel: Int by <!DELEGATE_SPECIAL_FUNCTION_NONE_APPLICABLE!>Delegate()<!>
 
 class Delegate {
   fun get(t: Any?, p: PropertyMetadata, a: Int): Int {
-    t.equals(p) // to avoid UNUSED_PARAMETER warning
     return a
   }
 }

compiler/testData/diagnostics/tests/delegatedProperty/wrongCountOfParametersInSet.kt

@@ -1,3 +1,5 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
 class A {
   var a: Int by <!DELEGATE_SPECIAL_FUNCTION_NONE_APPLICABLE!>Delegate()<!>
 }
@@ -6,12 +8,8 @@ var aTopLevel: Int by <!DELEGATE_SPECIAL_FUNCTION_NONE_APPLICABLE!>Delegate()<!>
 
 class Delegate {
   fun get(t: Any?, p: PropertyMetadata): Int {
-    t.equals(p) // to avoid UNUSED_PARAMETER warning
     return 1
   }
 
-  fun set(t: Any?, p: PropertyMetadata, a: Int, c: Int) {
-    t.equals(p) // to avoid UNUSED_PARAMETER warning
-    c.equals(a)
-  }
+  fun set(t: Any?, p: PropertyMetadata, a: Int, c: Int) {}
 }

compiler/testData/diagnostics/tests/delegatedProperty/wrongSetterReturnType.kt

@@ -1,13 +1,13 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
 var b: Int by Delegate()
 
 class Delegate {
     fun get(t: Any?, p: PropertyMetadata): Int {
-      t.equals(p) // to avoid UNUSED_PARAMETER warning
       return 1
     }
 
     fun set(t: Any?, p: PropertyMetadata, i: Int): Int {
-      t.equals(p) // to avoid UNUSED_PARAMETER warning
       return i
     }
 }

compiler/testData/diagnostics/tests/extensions/ExtensionFunctions.kt

@@ -63,7 +63,7 @@ import outer.*
 
             command.foo
 
-            command.equals(null)
+            command<!UNSAFE_CALL!>.<!>equals(null)
             command?.equals(null)
             command.equals1(null)
             command?.equals1(null)

compiler/testData/diagnostics/tests/multimodule/duplicateClass/collectionMethodStub.txt

@@ -12,7 +12,6 @@ internal final class C : kotlin.MutableIterator<kotlin.Int> {
 
 package kotlin {
     public fun </*0*/ reified T> arrayOfNulls(/*0*/ size: kotlin.Int): kotlin.Array<T?>
-    public fun kotlin.Any?.equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public fun kotlin.Any?.identityEquals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public fun kotlin.String?.plus(/*0*/ other: kotlin.Any?): kotlin.String
     public fun kotlin.Any?.toString(): kotlin.String

compiler/testData/diagnostics/tests/regressions/kt127.kt

@@ -2,7 +2,6 @@
 
 class Foo() {}
 
-fun Any.equals(<!UNUSED_PARAMETER!>other<!> : Any?) : Boolean = true
 fun Any?.equals1(<!UNUSED_PARAMETER!>other<!> : Any?) : Boolean = true
 
 fun main(args: Array<String>) {
@@ -14,5 +13,6 @@ fun main(args: Array<String>) {
     //   .equals(null) => 1; // must be resolved
     //   ?.equals(null) => 1 // same here
     // }
-    command.equals(null)
+    command.equals1(null)
+    command?.equals(null)
 }

compiler/testData/diagnostics/tests/regressions/kt127.txt

@@ -1,7 +1,6 @@
 package
 
 internal fun main(/*0*/ args: kotlin.Array<kotlin.String>): kotlin.Unit
-internal fun kotlin.Any.equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
 internal fun kotlin.Any?.equals1(/*0*/ other: kotlin.Any?): kotlin.Boolean
 
 internal final class Foo {

compiler/testData/diagnostics/tests/regressions/kt860.txt

@@ -2,7 +2,6 @@ package
 
 package kotlin {
     public fun </*0*/ reified T> arrayOfNulls(/*0*/ size: kotlin.Int): kotlin.Array<T?>
-    public fun kotlin.Any?.equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public fun kotlin.Any?.identityEquals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public fun kotlin.String?.plus(/*0*/ other: kotlin.Any?): kotlin.String
     public fun kotlin.Any?.toString(): kotlin.String