disable inline to anonymous for type params (IDEA-140846)

java/java-impl/src/com/intellij/refactoring/inline/InlineToAnonymousClassHandler.java

@@ -203,6 +203,9 @@ public class InlineToAnonymousClassHandler extends JavaInlineActionHandler {
 
   @Nullable
   public static String getCannotInlineMessage(final PsiClass psiClass) {
+    if (psiClass instanceof PsiTypeParameter) {
+      return "Type parameters cannot be inlined";
+    }
     if (psiClass.isAnnotationType()) {
       return "Annotation types cannot be inlined";
     }

java/java-tests/testData/refactoring/inlineToAnonymousClass/NoInlineTypeParameter.java

@@ -0,0 +1,4 @@
+class B<K>{}
+class A<<caret>T> extends B<T> {
+    A<String> a;
+}

java/java-tests/testSrc/com/intellij/refactoring/inline/InlineToAnonymousClassTest.java

@@ -332,6 +332,10 @@ public class InlineToAnonymousClassTest extends LightRefactoringTestCase {
     doTestNoInline("Library classes cannot be inlined");
   }
 
+  public void testNoInlineTypeParameter() throws Exception {
+    doTestNoInline("Type parameters cannot be inlined");
+  }
+
   public void testNoInlineNoUsages() throws Exception {
     doTestPreprocessUsages("Class is never used");
   }