Corrected parser: incomplete code should never cause brace disbalance

Fixed KT-7539 fq name inserted when completing nested traits name

 #KT-7539

idea/idea-completion/testData/basic/common/InterfaceNameBeforeRunBug.kt

@@ -0,0 +1,12 @@
+package a.b.c.d
+
+class B {
+    public val mark: M<caret> = run {
+
+    }
+
+    interface Mark {
+    }
+}
+
+// EXIST: { itemText: "Mark", tailText: " (a.b.c.d.B)" }

idea/idea-completion/testData/handlers/basic/InterfaceNameBeforeRunBug.kt

@@ -0,0 +1,12 @@
+package a.b.c.d
+
+class B {
+    public val mark: M<caret> = run {
+
+    }
+
+    interface Mark {
+    }
+}
+
+// ELEMENT: Mark

idea/idea-completion/testData/handlers/basic/InterfaceNameBeforeRunBug.kt.after

@@ -0,0 +1,12 @@
+package a.b.c.d
+
+class B {
+    public val mark: Mark<caret> = run {
+
+    }
+
+    interface Mark {
+    }
+}
+
+// ELEMENT: Mark

idea/idea-completion/tests/org/jetbrains/kotlin/idea/completion/test/JSBasicCompletionTestGenerated.java

@@ -643,6 +643,12 @@ public class JSBasicCompletionTestGenerated extends AbstractJSBasicCompletionTes
             doTest(fileName);
         }
 
+        @TestMetadata("InterfaceNameBeforeRunBug.kt")
+        public void testInterfaceNameBeforeRunBug() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("idea/idea-completion/testData/basic/common/InterfaceNameBeforeRunBug.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("JavaPackage.kt")
         public void testJavaPackage() throws Exception {
             String fileName = JetTestUtils.navigationMetadata("idea/idea-completion/testData/basic/common/JavaPackage.kt");

idea/idea-completion/tests/org/jetbrains/kotlin/idea/completion/test/JvmBasicCompletionTestGenerated.java

@@ -643,6 +643,12 @@ public class JvmBasicCompletionTestGenerated extends AbstractJvmBasicCompletionT
             doTest(fileName);
         }
 
+        @TestMetadata("InterfaceNameBeforeRunBug.kt")
+        public void testInterfaceNameBeforeRunBug() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("idea/idea-completion/testData/basic/common/InterfaceNameBeforeRunBug.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("JavaPackage.kt")
         public void testJavaPackage() throws Exception {
             String fileName = JetTestUtils.navigationMetadata("idea/idea-completion/testData/basic/common/JavaPackage.kt");

idea/idea-completion/tests/org/jetbrains/kotlin/idea/completion/test/handlers/BasicCompletionHandlerTestGenerated.java

@@ -95,6 +95,12 @@ public class BasicCompletionHandlerTestGenerated extends AbstractBasicCompletion
         doTest(fileName);
     }
 
+    @TestMetadata("InterfaceNameBeforeRunBug.kt")
+    public void testInterfaceNameBeforeRunBug() throws Exception {
+        String fileName = JetTestUtils.navigationMetadata("idea/idea-completion/testData/handlers/basic/InterfaceNameBeforeRunBug.kt");
+        doTest(fileName);
+    }
+
     @TestMetadata("NestedTypeArg.kt")
     public void testNestedTypeArg() throws Exception {
         String fileName = JetTestUtils.navigationMetadata("idea/idea-completion/testData/handlers/basic/NestedTypeArg.kt");