From a0577d650df0963dd4460aa97c9f910e54b70f62 Mon Sep 17 00:00:00 2001
From: John Camelon <jcamelon@ca.ibm.com>
Date: Thu, 7 Sep 2006 18:15:24 +0000
Subject: [PATCH] Patch for Andrew Niefer : Bug 151440 - Content Assist makes
 Eclipse freeze

---
 .../cdt/internal/core/parser/token/BasicTokenDuple.java       | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/token/BasicTokenDuple.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/token/BasicTokenDuple.java
index aa4d225c440..e55bdc5a927 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/token/BasicTokenDuple.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/token/BasicTokenDuple.java
@@ -111,6 +111,10 @@ public class BasicTokenDuple implements ITokenDuple {
 			if( token.getType() == IToken.tLT )
 				token = TokenFactory.consumeTemplateIdArguments( token, last );
 			if( token.getType() == IToken.tCOLONCOLON  ){
+				if( startOfSegment == token ){
+					//an empty segment, prev is not valid (and neither is the code)
+					prev = null;
+				}
 			    ITokenDuple d = TokenFactory.createTokenDuple( startOfSegment, ( prev == null ) ? startOfSegment : prev );
 			    r.add( d );
 			    startOfSegment = token.getNext();