Fixed codegen for non-public SAM-adapters

compiler/backend/src/org/jetbrains/kotlin/codegen/ExpressionCodegen.java

@@ -2329,6 +2329,10 @@ public class ExpressionCodegen extends JetVisitor<StackValue, StackValue> implem
     @NotNull
     private FunctionDescriptor accessibleFunctionDescriptor(@NotNull ResolvedCall<?> resolvedCall) {
         FunctionDescriptor descriptor = (FunctionDescriptor) resolvedCall.getResultingDescriptor();
+        FunctionDescriptor originalIfSamAdapter = SamCodegenUtil.getOriginalIfSamAdapter(descriptor);
+        if (originalIfSamAdapter != null) {
+            descriptor = originalIfSamAdapter;
+        }
         // $default method is not private, so you need no accessor to call it
         return usesDefaultArguments(resolvedCall) ? descriptor : context.accessibleFunctionDescriptor(descriptor);
     }

compiler/testData/codegen/boxAgainstJava/sam/adapters/protectedFromBase.java

@@ -0,0 +1,5 @@
+class JavaClass<T> {
+    protected void execute(T t, Runnable r) {
+        r.run();
+    }
+}

compiler/testData/codegen/boxAgainstJava/sam/adapters/protectedFromBase.kt

@@ -0,0 +1,13 @@
+class KotlinClass : JavaClass<String>() {
+    fun doIt(): String {
+        var result = ""
+        execute("") {
+            result = "OK"
+        }
+        return result
+    }
+}
+
+fun box(): String {
+    return KotlinClass().doIt()
+}

compiler/tests/org/jetbrains/kotlin/codegen/generated/BlackBoxAgainstJavaCodegenTestGenerated.java

@@ -705,6 +705,12 @@ public class BlackBoxAgainstJavaCodegenTestGenerated extends AbstractBlackBoxCod
                 doTestAgainstJava(fileName);
             }
 
+            @TestMetadata("protectedFromBase.kt")
+            public void testProtectedFromBase() throws Exception {
+                String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/boxAgainstJava/sam/adapters/protectedFromBase.kt");
+                doTestAgainstJava(fileName);
+            }
+
             @TestMetadata("severalSamParameters.kt")
             public void testSeveralSamParameters() throws Exception {
                 String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/boxAgainstJava/sam/adapters/severalSamParameters.kt");