From 1cea268c9298ffd9477ab00f6507613286de8c59 Mon Sep 17 00:00:00 2001
From: Christian Stenger <christian.stenger@qt.io>
Date: Fri, 24 Apr 2020 15:10:53 +0200
Subject: [PATCH] QmlJSEditor: Fix semantic highlighting

Do not send empty ranges as they may mess up the
highlighting of the file.

Fixes: QTCREATORBUG-23729
Change-Id: I77adcccb3a3da890e87f0b2860b945819446a3a8
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>
---
 src/plugins/qmljseditor/qmljssemantichighlighter.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/plugins/qmljseditor/qmljssemantichighlighter.cpp b/src/plugins/qmljseditor/qmljssemantichighlighter.cpp
index 65e9b0ca2e5..b9ef9dc7469 100644
--- a/src/plugins/qmljseditor/qmljssemantichighlighter.cpp
+++ b/src/plugins/qmljseditor/qmljssemantichighlighter.cpp
@@ -269,8 +269,11 @@ protected:
             }
         }
 
-        if (type != SemanticHighlighter::UnknownType)
-            addUse(location, type);
+        if (type != SemanticHighlighter::UnknownType) {
+            // do not add uses of length 0 - this messes up highlighting (e.g. anon functions)
+            if (location.length != 0)
+                addUse(location, type);
+        }
     }
 
     void processTypeId(UiQualifiedId *typeId)