From f547be16dfeecb1e6271982788af75a079351f7c Mon Sep 17 00:00:00 2001
From: Jan Koehnlein <jan.koehnlein@typefox.io>
Date: Tue, 22 Aug 2017 16:18:03 +0200
Subject: [PATCH] [server] another NPE guard

---
 .../server/xtext/tracing/TraceRegionProvider.xtend     | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/server/xtext-diagram/src/main/java/io/typefox/sprotty/server/xtext/tracing/TraceRegionProvider.xtend b/server/xtext-diagram/src/main/java/io/typefox/sprotty/server/xtext/tracing/TraceRegionProvider.xtend
index c6ef0b0..dd6031a 100644
--- a/server/xtext-diagram/src/main/java/io/typefox/sprotty/server/xtext/tracing/TraceRegionProvider.xtend
+++ b/server/xtext-diagram/src/main/java/io/typefox/sprotty/server/xtext/tracing/TraceRegionProvider.xtend
@@ -35,10 +35,12 @@ class TraceRegionProvider {
 	
 	def TextRegion getSignificantRegion(EObject element) {
 		val feature = element.relevantFeature
-		if (feature !== null) 
-			return NodeModelUtils.findNodesForFeature(element, feature).head.toTextRegion
-		else 
-			return NodeModelUtils.findActualNodeFor(element).toTextRegion
+		if (feature !== null) {
+			val node = NodeModelUtils.findNodesForFeature(element, feature).head
+			if(node !== null)
+				return node.toTextRegion
+		}
+		return NodeModelUtils.findActualNodeFor(element).toTextRegion
 	}
 
 	protected def toTextRegion(INode node) {