diff --git a/Source/cmForEachCommand.cxx b/Source/cmForEachCommand.cxx index 3ae244efb1..e4a12cbd2d 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::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; }