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-rw-r--r--Source/cmForEachCommand.cxx8
1 files changed, 6 insertions, 2 deletions
diff --git a/Source/cmForEachCommand.cxx b/Source/cmForEachCommand.cxx
index 3ae244e..e4a12cb 100644
--- a/Source/cmForEachCommand.cxx
+++ b/Source/cmForEachCommand.cxx
@@ -34,7 +34,11 @@ IsFunctionBlocked(const cmListFileFunction& lff, cmMakefile &mf)
if(!expandedArguments.empty() && (expandedArguments[0] == m_Args[0]))
{
// store the old value
- const char *oldDef = mf.GetDefinition(m_Args[0].c_str());
+ std::string oldDef;
+ if (mf.GetDefinition(m_Args[0].c_str()))
+ {
+ oldDef = mf.GetDefinition(m_Args[0].c_str());
+ }
m_Executing = true;
std::vector<std::string>::const_iterator j = m_Args.begin();
++j;
@@ -52,7 +56,7 @@ IsFunctionBlocked(const cmListFileFunction& lff, cmMakefile &mf)
}
}
// restore the variable to its prior value
- mf.AddDefinition(m_Args[0].c_str(),oldDef);
+ mf.AddDefinition(m_Args[0].c_str(),oldDef.c_str());
mf.RemoveFunctionBlocker(lff);
return true;
}