From 9b43417e24baa7c59effc701ced410fc89749881 Mon Sep 17 00:00:00 2001
From: Moritz Eysholdt <moritz.eysholdt@typefox.io>
Date: Thu, 11 Aug 2016 14:59:00 +0200
Subject: [PATCH] make grammar GrammarElementTitleSwitch more robust

Signed-off-by: Moritz Eysholdt <moritz.eysholdt@typefox.io>
---
 .../xtext/grammaranalysis/impl/GrammarElementTitleSwitch.java   | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/org.eclipse.xtext/src/org/eclipse/xtext/grammaranalysis/impl/GrammarElementTitleSwitch.java b/org.eclipse.xtext/src/org/eclipse/xtext/grammaranalysis/impl/GrammarElementTitleSwitch.java
index 909e87e83..da29767d4 100644
--- a/org.eclipse.xtext/src/org/eclipse/xtext/grammaranalysis/impl/GrammarElementTitleSwitch.java
+++ b/org.eclipse.xtext/src/org/eclipse/xtext/grammaranalysis/impl/GrammarElementTitleSwitch.java
@@ -104,6 +104,8 @@ public class GrammarElementTitleSwitch extends XtextSwitch<String> implements Fu
 		if (!showQualified && !showRule)
 			return result;
 		AbstractRule rule = GrammarUtil.containingRule(ele);
+		if (rule == null)
+			return "<AbstractElement not contained in AbstractRule!>:" + result;
 		if (!showQualified)
 			return result + ":" + rule.getName();
 		GrammarElementTitleSwitch others = copy();