From d24115888572d50bfb9a89e2422ee4ecb10b47c3 Mon Sep 17 00:00:00 2001
From: Bill Hoffman <bill.hoffman@kitware.com>
Date: Fri, 18 Jan 2002 23:38:48 -0500
Subject: [PATCH] BUG: make sure regex match has a string to match

---
 Source/cmCableClassSet.cxx | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Source/cmCableClassSet.cxx b/Source/cmCableClassSet.cxx
index d46ee811e..39acd40de 100644
--- a/Source/cmCableClassSet.cxx
+++ b/Source/cmCableClassSet.cxx
@@ -717,8 +717,10 @@ bool ElementCombinationGenerator::GenerateTag(const cmStdString& element)
   if(regex.find(element))
     {
     m_Tag = "_";
-    if(regex.match(1) == "long ")
+    if(regex.start(1) > 0 && regex.match(1) == "long ")
+      {
       m_Tag.append("l");
+      }
     m_Tag.append(regex.match(2));
     return true;
     }