Implement members: don't add 'actual' modifier for fake overrides

#KT-25044 Fixed

idea/idea-core/src/org/jetbrains/kotlin/idea/core/overrideImplement/OverrideMemberChooserObject.kt

@@ -122,8 +122,13 @@ fun OverrideMemberChooserObject.generateMember(targetClass: KtClassOrObject, cop
     }
 
     if (targetClass.hasActualModifier()) {
-        val expectClassDescriptors = targetClass.resolveToDescriptorIfAny()?.expectedDescriptors() ?: emptyList()
-        if (expectClassDescriptors.any { (it as? ClassDescriptor)?.findCallableMemberBySignature(immediateSuper)?.isExpect == true }) {
+        val expectClassDescriptors =
+            targetClass.resolveToDescriptorIfAny()?.expectedDescriptors()?.filterIsInstance<ClassDescriptor>().orEmpty()
+        if (expectClassDescriptors.any { expectClassDescriptor ->
+                val expectMemberDescriptor = expectClassDescriptor.findCallableMemberBySignature(immediateSuper)
+                expectMemberDescriptor?.isExpect == true && expectMemberDescriptor.kind != CallableMemberDescriptor.Kind.FAKE_OVERRIDE
+            }
+        ) {
             newMember.addModifier(KtTokens.ACTUAL_KEYWORD)
         }
     } else {

idea/testData/multiModuleQuickFix/implementMembersInActualClassNoExpectMember/common/common.kt

@@ -0,0 +1,5 @@
+expect interface ExpInterface {
+    fun first()
+}
+
+expect class ExpImpl : ExpInterface { }

idea/testData/multiModuleQuickFix/implementMembersInActualClassNoExpectMember/common/common.kt.after

@@ -0,0 +1,5 @@
+expect interface ExpInterface {
+    fun first()
+}
+
+expect class ExpImpl : ExpInterface { }

idea/testData/multiModuleQuickFix/implementMembersInActualClassNoExpectMember/jvm/jvm.kt

@@ -0,0 +1,8 @@
+// "Implement members" "true"
+// ERROR: Class 'ExpImpl' is not abstract and does not implement abstract member public abstract actual fun first(): Unit defined in ExpInterface
+
+actual interface ExpInterface {
+    actual fun first()
+}
+
+actual class ExpImpl<caret> : ExpInterface

idea/testData/multiModuleQuickFix/implementMembersInActualClassNoExpectMember/jvm/jvm.kt.after

@@ -0,0 +1,12 @@
+// "Implement members" "true"
+// ERROR: Class 'ExpImpl' is not abstract and does not implement abstract member public abstract actual fun first(): Unit defined in ExpInterface
+
+actual interface ExpInterface {
+    actual fun first()
+}
+
+actual class ExpImpl : ExpInterface {
+    override fun first() {
+        TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
+    }
+}

idea/tests/org/jetbrains/kotlin/idea/quickfix/QuickFixMultiModuleTestGenerated.java

@@ -229,6 +229,11 @@ public class QuickFixMultiModuleTestGenerated extends AbstractQuickFixMultiModul
         runTest("idea/testData/multiModuleQuickFix/implementAbstractExpectMemberInheritedFromInterface/");
     }
 
+    @TestMetadata("implementMembersInActualClassNoExpectMember")
+    public void testImplementMembersInActualClassNoExpectMember() throws Exception {
+        runTest("idea/testData/multiModuleQuickFix/implementMembersInActualClassNoExpectMember/");
+    }
+
     @TestMetadata("implementMembersInImplClassNonImplInheritor")
     public void testImplementMembersInImplClassNonImplInheritor() throws Exception {
         runTest("idea/testData/multiModuleQuickFix/implementMembersInImplClassNonImplInheritor/");