Fix type of callable reference to fake override

compiler/frontend/src/org/jetbrains/kotlin/resolve/callableReferences/CallableReferencesResolutionUtils.kt

@@ -205,8 +205,13 @@ private fun createReflectionTypeForCallableDescriptor(
         trace: BindingTrace?,
         reportOn: JetExpression?
 ): JetType? {
-    val extensionReceiver = descriptor.getExtensionReceiverParameter()
-    val dispatchReceiver = descriptor.getDispatchReceiverParameter()
+    val extensionReceiver = descriptor.extensionReceiverParameter
+    val dispatchReceiver = descriptor.dispatchReceiverParameter?.let { dispatchReceiver ->
+        // See CallableDescriptor#getOwnerForEffectiveDispatchReceiverParameter
+        if ((descriptor as? CallableMemberDescriptor)?.kind == CallableMemberDescriptor.Kind.FAKE_OVERRIDE)
+            DescriptorUtils.getDispatchReceiverParameterIfNeeded(descriptor.containingDeclaration)
+        else dispatchReceiver
+    }
 
     if (extensionReceiver != null && dispatchReceiver != null && descriptor is CallableMemberDescriptor) {
         if (reportOn != null) {

compiler/testData/diagnostics/tests/callableReference/function/fakeOverrideType.kt

@@ -0,0 +1,17 @@
+// !CHECK_TYPE
+
+import kotlin.reflect.KFunction2
+
+open class A {
+    fun foo(s: String): String = s
+}
+
+class B : A() {
+}
+
+
+fun test() {
+    B::foo checkType { _<KFunction2<B, String, String>>() }
+
+    (B::hashCode)(<!TYPE_MISMATCH!>"No."<!>)
+}

compiler/testData/diagnostics/tests/callableReference/function/fakeOverrideType.txt

@@ -0,0 +1,19 @@
+package
+
+public fun test(): kotlin.Unit
+
+public open class A {
+    public constructor A()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public final fun foo(/*0*/ s: kotlin.String): kotlin.String
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class B : A {
+    public constructor B()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public final override /*1*/ /*fake_override*/ fun foo(/*0*/ s: kotlin.String): kotlin.String
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}

compiler/tests/org/jetbrains/kotlin/checkers/JetDiagnosticsTestGenerated.java

@@ -1721,6 +1721,12 @@ public class JetDiagnosticsTestGenerated extends AbstractJetDiagnosticsTest {
                     doTest(fileName);
                 }
 
+                @TestMetadata("fakeOverrideType.kt")
+                public void testFakeOverrideType() throws Exception {
+                    String fileName = JetTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/callableReference/function/fakeOverrideType.kt");
+                    doTest(fileName);
+                }
+
                 @TestMetadata("genericClassFromTopLevel.kt")
                 public void testGenericClassFromTopLevel() throws Exception {
                     String fileName = JetTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/callableReference/function/genericClassFromTopLevel.kt");