default methods: check for super class is now needed (IDEA-122720)

java/java-psi-api/src/com/intellij/psi/util/PsiUtil.java

@@ -101,7 +101,7 @@ public final class PsiUtil extends PsiUtilCore {
 
   @NotNull
   public static JavaResolveResult getAccessObjectClass(@NotNull PsiExpression expression) {
-    if (expression instanceof PsiSuperExpression) return JavaResolveResult.EMPTY;
+    if (expression instanceof PsiSuperExpression && !isLanguageLevel8OrHigher(expression)) return JavaResolveResult.EMPTY;
     PsiType type = expression.getType();
     if (type instanceof PsiClassType) {
       return ((PsiClassType)type).resolveGenerics();

java/java-psi-impl/src/com/intellij/psi/scope/util/PsiScopesUtil.java

@@ -439,7 +439,7 @@ public class PsiScopesUtil {
     }
     else if (resolve instanceof PsiClass) {
       PsiExpression qualifier = methodCall.getMethodExpression().getQualifierExpression();
-      if (!(qualifier instanceof PsiSuperExpression)) {
+      if (!(qualifier instanceof PsiSuperExpression) || PsiUtil.isLanguageLevel8OrHigher(methodCall)) {
         processor.setAccessClass((PsiClass)PsiUtil.getAccessObjectClass(qualifier).getElement());
       }
     }

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/lambda/interfaceMethods/IDEA122720.java

@@ -0,0 +1,21 @@
+interface I {
+  default void f() {}
+}
+
+class P {
+  public void f() {}
+}
+
+class AP extends P implements I {
+  @Override
+  public void f() {
+    I.super.f();
+  }
+}
+
+class AC implements Cloneable {
+
+  public Object clone() throws CloneNotSupportedException {
+    return Cloneable.super.<error descr="'clone()' has protected access in 'java.lang.Object'">clone</error>();
+  }
+}

java/java-tests/testSrc/com/intellij/codeInsight/daemon/lambda/Interface8MethodsHighlightingTest.java

@@ -34,6 +34,7 @@ public class Interface8MethodsHighlightingTest extends LightDaemonAnalyzerTestCa
   public void testDefaultMethodOverrideEquivalentObject() { doTest(false, false); }
   public void testStaticMethods() { doTest(false, false); }
   public void testFinalStaticDefaultMethods() { doTest(false, false); }
+  public void testIDEA122720() { doTest(false, false); }
   public void testDefaultSupersInStaticContext() {
     doTest(false, false);
   }