No more SOE in UnusedSymbolInspection #KT-13536 Fixed

(cherry picked from commit 23961ee)

idea/src/org/jetbrains/kotlin/idea/inspections/UnusedSymbolInspection.kt

@@ -263,8 +263,10 @@ class UnusedSymbolInspection : AbstractKotlinInspection() {
                     }
                     else {
                         if (import.importedFqName != declaration.fqName) {
-                            val importedDeclaration = import.importedReference?.getQualifiedElementSelector()?.mainReference?.resolve() as? KtNamedDeclaration
-                            return importedDeclaration == null || !hasNonTrivialUsages(importedDeclaration)
+                            val importedDeclaration =
+                                    import.importedReference?.getQualifiedElementSelector()?.mainReference?.resolve() as? KtNamedDeclaration
+                            return importedDeclaration == null ||
+                                   (importedDeclaration != declaration && !hasNonTrivialUsages(importedDeclaration))
                         }
                     }
                 }

idea/testData/quickfix/removeUnused/importEnumValues.kt

@@ -0,0 +1,6 @@
+// "Safe delete 'MyEnum'" "false"
+// ACTION: Create test
+
+import MyEnum.values
+
+enum class <caret>MyEnum

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

@@ -6928,6 +6928,12 @@ public class QuickFixTestGenerated extends AbstractQuickFixTest {
             doTest(fileName);
         }
 
+        @TestMetadata("importEnumValues.kt")
+        public void testImportEnumValues() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/quickfix/removeUnused/importEnumValues.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("notTriangle.kt")
         public void testNotTriangle() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("idea/testData/quickfix/removeUnused/notTriangle.kt");