diff -ur cmake-2.6.3/Source/cmIncludeDirectoryCommand.cxx cmake-2.6.3-#475876/Source/cmIncludeDirectoryCommand.cxx
--- cmake-2.6.3/Source/cmIncludeDirectoryCommand.cxx	2009-02-21 21:36:52.000000000 +0100
+++ cmake-2.6.3-#475876/Source/cmIncludeDirectoryCommand.cxx	2009-03-09 02:55:46.000000000 +0100
@@ -95,13 +95,13 @@
 
   // remove any leading or trailing spaces and \r
   pos = ret.size()-1;
-  while(ret[pos] == ' ' || ret[pos] == '\r')
+  while(ret.size() && (ret[pos] == ' ' || ret[pos] == '\r'))
     {
     ret.erase(pos);
     pos--;
     }
   pos = 0;
-  while(ret.size() && ret[pos] == ' ' || ret[pos] == '\r')
+  while(ret.size() && (ret[pos] == ' ' || ret[pos] == '\r'))
     {
     ret.erase(pos,1);
     }