Deparenthesizing this expression.

idea/src/org/jetbrains/kotlin/idea/highlighter/KotlinRecursiveCallLineMarkerProvider.kt

@@ -80,7 +80,8 @@ public class KotlinRecursiveCallLineMarkerProvider() : LineMarkerProvider {
             val receiverOwner =
                     when (receiver) {
                         is ExpressionReceiver -> {
-                            val thisRef = (receiver.getExpression() as? JetThisExpression)?.getInstanceReference() ?: return true
+                            val thisRef = (JetPsiUtil.deparenthesize(receiver.getExpression()) as?
+                                    JetThisExpression)?.getInstanceReference() ?: return true
                             bindingContext[BindingContext.REFERENCE_TARGET, thisRef] ?: return true
                         }
 

idea/testData/codeInsight/lineMarker/recursiveCall/thisQualifier.kt

@@ -7,6 +7,7 @@ class Outer {
             if (a > 0) {
                 this.<lineMarker>f</lineMarker>(a - 1)
                 this@F.<lineMarker>f</lineMarker>(a - 1)
+                ((this@F)).<lineMarker>f</lineMarker>(a - 1)
 
                 this@Outer.f(a - 1)
             }