8062359: javac Attr crashes with NPE in TypeAnnotationsValidator visitNewClass

Reviewed-by: jlahoda, vromero

src/share/classes/com/sun/tools/javac/comp/Attr.java

@@ -4503,14 +4503,15 @@ public class Attr extends JCTree.Visitor {
             super.visitTypeTest(tree);
         }
         public void visitNewClass(JCNewClass tree) {
-            if (tree.clazz.hasTag(ANNOTATED_TYPE)) {
-                checkForDeclarationAnnotations(((JCAnnotatedType) tree.clazz).annotations,
-                        tree.clazz.type.tsym);
-            }
-            if (tree.def != null) {
-                checkForDeclarationAnnotations(tree.def.mods.annotations, tree.clazz.type.tsym);
-            }
-            if (tree.clazz.type != null) {
+            if (tree.clazz != null && tree.clazz.type != null) {
+                if (tree.clazz.hasTag(ANNOTATED_TYPE)) {
+                    checkForDeclarationAnnotations(((JCAnnotatedType) tree.clazz).annotations,
+                            tree.clazz.type.tsym);
+                }
+                if (tree.def != null) {
+                    checkForDeclarationAnnotations(tree.def.mods.annotations, tree.clazz.type.tsym);
+                }
+
                 validateAnnotatedType(tree.clazz, tree.clazz.type);
             }
             super.visitNewClass(tree);

test/tools/javac/8062359/UnresolvableClassNPEInAttrTest.java

+/*
+ * @test /nodynamiccopyright/
+ * @bug 8062359
+ * @summary NullPointerException in Attr when type-annotating an anonymous
+ *          inner class in an unresolvable class
+ * @compile/fail/ref=UnresolvableClassNPEInAttrTest.out -XDrawDiagnostics UnresolvableClassNPEInAttrTest.java
+ */
+
+public class UnresolvableClassNPEInAttrTest {
+    public static void main(String[] args) {
+        new Undefined() {
+            void test() {
+                new Object() {};
+            }
+        };
+    }
+}

test/tools/javac/8062359/UnresolvableClassNPEInAttrTest.out

+UnresolvableClassNPEInAttrTest.java:11:13: compiler.err.cant.resolve.location: kindname.class, Undefined, , , (compiler.misc.location: kindname.class, UnresolvableClassNPEInAttrTest, null)
+1 error