Fix 'this' case in implicit this inspection

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

@@ -32,6 +32,7 @@ class ImplicitThisInspection : AbstractKotlinInspection() {
     override fun buildVisitor(holder: ProblemsHolder, isOnTheFly: Boolean) = object : KtVisitorVoid() {
         override fun visitSimpleNameExpression(expression: KtSimpleNameExpression) {
             if (expression !is KtNameReferenceExpression) return
+            if (expression.parent is KtThisExpression) return
             if (expression.isSelectorOfDotQualifiedExpression()) return
             val parent = expression.parent
             if (parent is KtCallExpression && parent.isSelectorOfDotQualifiedExpression()) return

idea/testData/inspectionsLocal/implicitThis/already.kt

@@ -0,0 +1,4 @@
+// PROBLEM: none
+
+class Your(val x: Int)
+fun Your.foo() = <caret>this.x

idea/tests/org/jetbrains/kotlin/idea/inspections/LocalInspectionTestGenerated.java

@@ -582,45 +582,6 @@ public class LocalInspectionTestGenerated extends AbstractLocalInspectionTest {
         }
     }
 
-    @TestMetadata("idea/testData/inspectionsLocal/ImplicitNullableNothingType")
-    @TestDataPath("$PROJECT_ROOT")
-    @RunWith(JUnit3RunnerWithInners.class)
-    public static class ImplicitNullableNothingType extends AbstractLocalInspectionTest {
-        public void testAllFilesPresentInImplicitNullableNothingType() throws Exception {
-            KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("idea/testData/inspectionsLocal/ImplicitNullableNothingType"), Pattern.compile("^([\\w\\-_]+)\\.kt$"), TargetBackend.ANY, true);
-        }
-
-        @TestMetadata("final.kt")
-        public void testFinal() throws Exception {
-            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/ImplicitNullableNothingType/final.kt");
-            doTest(fileName);
-        }
-
-        @TestMetadata("function.kt")
-        public void testFunction() throws Exception {
-            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/ImplicitNullableNothingType/function.kt");
-            doTest(fileName);
-        }
-
-        @TestMetadata("top.kt")
-        public void testTop() throws Exception {
-            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/ImplicitNullableNothingType/top.kt");
-            doTest(fileName);
-        }
-
-        @TestMetadata("val.kt")
-        public void testVal() throws Exception {
-            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/ImplicitNullableNothingType/val.kt");
-            doTest(fileName);
-        }
-
-        @TestMetadata("variable.kt")
-        public void testVariable() throws Exception {
-            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/ImplicitNullableNothingType/variable.kt");
-            doTest(fileName);
-        }
-    }
-
     @TestMetadata("idea/testData/inspectionsLocal/explicitThis")
     @TestDataPath("$PROJECT_ROOT")
     @RunWith(JUnit3RunnerWithInners.class)
@@ -714,6 +675,45 @@ public class LocalInspectionTestGenerated extends AbstractLocalInspectionTest {
         }
     }
 
+    @TestMetadata("idea/testData/inspectionsLocal/ImplicitNullableNothingType")
+    @TestDataPath("$PROJECT_ROOT")
+    @RunWith(JUnit3RunnerWithInners.class)
+    public static class ImplicitNullableNothingType extends AbstractLocalInspectionTest {
+        public void testAllFilesPresentInImplicitNullableNothingType() throws Exception {
+            KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("idea/testData/inspectionsLocal/ImplicitNullableNothingType"), Pattern.compile("^([\\w\\-_]+)\\.kt$"), TargetBackend.ANY, true);
+        }
+
+        @TestMetadata("final.kt")
+        public void testFinal() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/ImplicitNullableNothingType/final.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("function.kt")
+        public void testFunction() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/ImplicitNullableNothingType/function.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("top.kt")
+        public void testTop() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/ImplicitNullableNothingType/top.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("val.kt")
+        public void testVal() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/ImplicitNullableNothingType/val.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("variable.kt")
+        public void testVariable() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/ImplicitNullableNothingType/variable.kt");
+            doTest(fileName);
+        }
+    }
+
     @TestMetadata("idea/testData/inspectionsLocal/implicitThis")
     @TestDataPath("$PROJECT_ROOT")
     @RunWith(JUnit3RunnerWithInners.class)
@@ -722,6 +722,12 @@ public class LocalInspectionTestGenerated extends AbstractLocalInspectionTest {
             KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("idea/testData/inspectionsLocal/implicitThis"), Pattern.compile("^([\\w\\-_]+)\\.kt$"), TargetBackend.ANY, true);
         }
 
+        @TestMetadata("already.kt")
+        public void testAlready() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/implicitThis/already.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("function.kt")
         public void testFunction() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/implicitThis/function.kt");