Don't propose to make objects abstract (KT-9795)

#KT-9795 Fixed

idea/src/org/jetbrains/kotlin/idea/quickfix/AddModifierFix.java

@@ -77,7 +77,7 @@ public class AddModifierFix extends KotlinQuickFixAction<KtModifierListOwner> {
     }
 
     @Override
-    public void invoke(@NotNull Project project, Editor editor, KtFile file) throws IncorrectOperationException {
+    public void invoke(@NotNull Project project, Editor editor, @NotNull KtFile file) throws IncorrectOperationException {
         getElement().addModifier(modifier);
     }
 
@@ -89,13 +89,11 @@ public class AddModifierFix extends KotlinQuickFixAction<KtModifierListOwner> {
     public static <T extends KtModifierListOwner> JetSingleIntentionActionFactory createFactory(final KtModifierKeywordToken modifier, final Class<T> modifierOwnerClass) {
         return new JetSingleIntentionActionFactory() {
             @Override
-            public IntentionAction createAction(Diagnostic diagnostic) {
+            public IntentionAction createAction(@NotNull Diagnostic diagnostic) {
                 KtModifierListOwner modifierListOwner = QuickFixUtil.getParentElementOfType(diagnostic, modifierOwnerClass);
                 if (modifierListOwner == null) return null;
 
-                if (modifier == KtTokens.ABSTRACT_KEYWORD &&
-                    modifierListOwner instanceof KtObjectDeclaration &&
-                    ((KtObjectDeclaration) modifierListOwner).isObjectLiteral()) return null;
+                if (modifier == KtTokens.ABSTRACT_KEYWORD && modifierListOwner instanceof KtObjectDeclaration) return null;
 
                 return new AddModifierFix(modifierListOwner, modifier);
             }

idea/testData/quickfix/modifiers/noAbstractForObject.kt

@@ -0,0 +1,10 @@
+// "Make 'Some' abstract" "false"
+// ACTION: Create test
+// ACTION: Implement members
+// ACTION: Move 'Some' to separate file
+// ERROR: Object 'Some' must be declared abstract or implement abstract member public abstract fun foo(): kotlin.Unit defined in T
+interface T {
+    fun foo()
+}
+
+object <caret>Some : T

idea/tests/org/jetbrains/kotlin/idea/quickfix/QuickFixTestGenerated.java

@@ -35,12 +35,6 @@ public class QuickFixTestGenerated extends AbstractQuickFixTest {
         JetTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("idea/testData/quickfix"), Pattern.compile("^([\\w\\-_]+)\\.kt$"), true);
     }
 
-    @TestMetadata("anonymousObject.kt")
-    public void testAnonymousObject() throws Exception {
-        String fileName = JetTestUtils.navigationMetadata("idea/testData/quickfix/anonymousObject.kt");
-        doTest(fileName);
-    }
-
     @TestMetadata("idea/testData/quickfix/abstract")
     @TestDataPath("$PROJECT_ROOT")
     @RunWith(JUnit3RunnerWithInners.class)
@@ -4502,6 +4496,18 @@ public class QuickFixTestGenerated extends AbstractQuickFixTest {
             doTest(fileName);
         }
 
+        @TestMetadata("noAbstractForAnonymousObject.kt")
+        public void testNoAbstractForAnonymousObject() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("idea/testData/quickfix/modifiers/noAbstractForAnonymousObject.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("noAbstractForObject.kt")
+        public void testNoAbstractForObject() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("idea/testData/quickfix/modifiers/noAbstractForObject.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("notAnAnnotationClass.kt")
         public void testNotAnAnnotationClass() throws Exception {
             String fileName = JetTestUtils.navigationMetadata("idea/testData/quickfix/modifiers/notAnAnnotationClass.kt");