JVM_IR KT-46160 don't use LambdaMetafactory for mutifile class members

compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/codegen/FirBlackBoxCodegenTestGenerated.java

@@ -20878,6 +20878,12 @@ public class FirBlackBoxCodegenTestGenerated extends AbstractFirBlackBoxCodegenT
                     runTest("compiler/testData/codegen/box/invokedynamic/sam/functionRefToJavaInterface/memberRef.kt");
                 }
 
+                @Test
+                @TestMetadata("multifileClassMemberFromStdlib.kt")
+                public void testMultifileClassMemberFromStdlib() throws Exception {
+                    runTest("compiler/testData/codegen/box/invokedynamic/sam/functionRefToJavaInterface/multifileClassMemberFromStdlib.kt");
+                }
+
                 @Test
                 @TestMetadata("nonTrivialReceiver.kt")
                 public void testNonTrivialReceiver() throws Exception {

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/indy/LambdaMetafactoryArguments.kt

@@ -78,6 +78,14 @@ internal class LambdaMetafactoryArgumentsBuilder(
             return null
         }
 
+        val implFunParent = implFun.parent
+        if (implFunParent is IrClass && implFunParent.origin == IrDeclarationOrigin.JVM_MULTIFILE_CLASS) {
+            // LambdaMetafactory treats multifile class part members as non-accessible,
+            // even if the member is referenced via facade,
+            // because corresponding part class is non-accessible
+            return null
+        }
+
         // Can't use JDK LambdaMetafactory for annotated lambdas.
         // JDK LambdaMetafactory doesn't copy annotations from implementation method to an instance method in a
         // corresponding synthetic class, which doesn't look like a binary compatible change.

compiler/testData/codegen/box/invokedynamic/sam/functionRefToJavaInterface/multifileClassMemberFromStdlib.kt

@@ -0,0 +1,28 @@
+// TARGET_BACKEND: JVM
+// JVM_TARGET: 1.8
+// SAM_CONVERSIONS: INDY
+// WITH_RUNTIME
+
+// CHECK_BYTECODE_TEXT
+// JVM_IR_TEMPLATES
+// 0 java/lang/invoke/LambdaMetafactory
+
+// IGNORE_BACKEND_FIR: JVM_IR
+//  ^ OVERLOAD_RESOLUTION_AMBIGUITY: Overload resolution ambiguity between candidates: [kotlin/collections/plus, kotlin/collections/plus]
+
+// FILE: multifileClassMemberFromStdlib.kt
+
+fun test(a: List<String>, b: List<String>, bf: BF) =
+    bf.apply(a, b)
+
+fun box(): String {
+    val ss = test(listOf("O"), listOf("K"), List<String>::plus)
+    return ss[0] + ss[1]
+}
+
+// FILE: BF.java
+import java.util.*;
+
+public interface BF {
+    List<String> apply(List<String> a, List<String> b);
+}

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

@@ -20854,6 +20854,12 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
                     runTest("compiler/testData/codegen/box/invokedynamic/sam/functionRefToJavaInterface/memberRef.kt");
                 }
 
+                @Test
+                @TestMetadata("multifileClassMemberFromStdlib.kt")
+                public void testMultifileClassMemberFromStdlib() throws Exception {
+                    runTest("compiler/testData/codegen/box/invokedynamic/sam/functionRefToJavaInterface/multifileClassMemberFromStdlib.kt");
+                }
+
                 @Test
                 @TestMetadata("nonTrivialReceiver.kt")
                 public void testNonTrivialReceiver() throws Exception {

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

@@ -20878,6 +20878,12 @@ public class IrBlackBoxCodegenTestGenerated extends AbstractIrBlackBoxCodegenTes
                     runTest("compiler/testData/codegen/box/invokedynamic/sam/functionRefToJavaInterface/memberRef.kt");
                 }
 
+                @Test
+                @TestMetadata("multifileClassMemberFromStdlib.kt")
+                public void testMultifileClassMemberFromStdlib() throws Exception {
+                    runTest("compiler/testData/codegen/box/invokedynamic/sam/functionRefToJavaInterface/multifileClassMemberFromStdlib.kt");
+                }
+
                 @Test
                 @TestMetadata("nonTrivialReceiver.kt")
                 public void testNonTrivialReceiver() throws Exception {

compiler/tests-gen/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java

@@ -17448,6 +17448,11 @@ public class LightAnalysisModeTestGenerated extends AbstractLightAnalysisModeTes
                     runTest("compiler/testData/codegen/box/invokedynamic/sam/functionRefToJavaInterface/memberRef.kt");
                 }
 
+                @TestMetadata("multifileClassMemberFromStdlib.kt")
+                public void testMultifileClassMemberFromStdlib() throws Exception {
+                    runTest("compiler/testData/codegen/box/invokedynamic/sam/functionRefToJavaInterface/multifileClassMemberFromStdlib.kt");
+                }
+
                 @TestMetadata("nonTrivialReceiver.kt")
                 public void testNonTrivialReceiver() throws Exception {
                     runTest("compiler/testData/codegen/box/invokedynamic/sam/functionRefToJavaInterface/nonTrivialReceiver.kt");