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-rw-r--r--Source/cmListFileCache.cxx8
1 files changed, 5 insertions, 3 deletions
diff --git a/Source/cmListFileCache.cxx b/Source/cmListFileCache.cxx
index 929b1cde82..0c73cd7252 100644
--- a/Source/cmListFileCache.cxx
+++ b/Source/cmListFileCache.cxx
@@ -307,7 +307,8 @@ struct cmListFileBacktrace::Entry : public cmListFileContext
unsigned int RefCount;
};
-cmListFileBacktrace::cmListFileBacktrace(cmStateSnapshot bottom, Entry* up,
+cmListFileBacktrace::cmListFileBacktrace(cmStateSnapshot const& bottom,
+ Entry* up,
cmListFileContext const& lfc)
: Bottom(bottom)
, Cur(new Entry(lfc, up))
@@ -316,7 +317,8 @@ cmListFileBacktrace::cmListFileBacktrace(cmStateSnapshot bottom, Entry* up,
this->Cur->Ref();
}
-cmListFileBacktrace::cmListFileBacktrace(cmStateSnapshot bottom, Entry* cur)
+cmListFileBacktrace::cmListFileBacktrace(cmStateSnapshot const& bottom,
+ Entry* cur)
: Bottom(bottom)
, Cur(cur)
{
@@ -332,7 +334,7 @@ cmListFileBacktrace::cmListFileBacktrace()
{
}
-cmListFileBacktrace::cmListFileBacktrace(cmStateSnapshot snapshot)
+cmListFileBacktrace::cmListFileBacktrace(cmStateSnapshot const& snapshot)
: Bottom(snapshot.GetCallStackBottom())
, Cur(CM_NULLPTR)
{