forbid diamonds on non-parameterized types (javac should be fixed accordingly)

java/java-impl/src/com/intellij/codeInsight/daemon/impl/analysis/GenericsHighlightUtil.java

@@ -112,6 +112,9 @@ public class GenericsHighlightUtil {
     if (referenceParameterList != null) {
       referenceElements = referenceParameterList.getTypeParameterElements();
       if (referenceElements.length == 1 && referenceElements[0].getType() instanceof PsiDiamondType) {
+        if (!typeParameterListOwner.hasTypeParameters()) {
+          return HighlightInfo.createHighlightInfo(HighlightInfoType.ERROR, referenceElements[0], "Diamond operator is not applicable for non-parameterized types");
+        }
         inferenceResult = ((PsiDiamondType)referenceElements[0].getType()).resolveInferredTypes();
         final String errorMessage = inferenceResult.getErrorMessage();
           if (errorMessage != null) {

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/advHighlighting7/DiamondMisc.java

@@ -67,3 +67,9 @@ class MyTest {
          }
      }
 }
+
+class NonParameterized {
+  void foo() {
+    new NonParameterized<<error descr="Diamond operator is not applicable for non-parameterized types"></error>>();
+  }
+}