From 00e7ea76e83153db1f95289a4b101b3031c97b99 Mon Sep 17 00:00:00 2001
From: Alex Neundorf <neundorf@kde.org>
Date: Fri, 4 Feb 2011 20:31:18 +0100
Subject: [PATCH] Fix crash in GraphVizWriter when GRAPHVIZ_TARGET_IGNORE_REGEX
 is used

GraphVizWriter could crash if GRAPHVIZ_TARGET_IGNORE_REGEX was set.
Patch from Christian Ehrlicher.

Alex
---
 Source/cmGraphVizWriter.cxx | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Source/cmGraphVizWriter.cxx b/Source/cmGraphVizWriter.cxx
index bdb33bcdf..de95aa593 100644
--- a/Source/cmGraphVizWriter.cxx
+++ b/Source/cmGraphVizWriter.cxx
@@ -272,6 +272,12 @@ void cmGraphVizWriter::WriteConnections(const char* targetName,
     std::map<cmStdString, cmStdString>::const_iterator libNameIt =
                                           this->TargetNamesNodes.find(libName);
 
+    // can happen e.g. if GRAPHVIZ_TARGET_IGNORE_REGEX is used
+    if(libNameIt == this->TargetNamesNodes.end())
+      {
+      continue;
+      }
+
     std::string connectionName = myNodeName;
     connectionName += "-";
     connectionName += libNameIt->second;