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-rw-r--r--Source/CTest/cmCTestP4.cxx1
1 files changed, 1 insertions, 0 deletions
diff --git a/Source/CTest/cmCTestP4.cxx b/Source/CTest/cmCTestP4.cxx
index 11f6a00..fdf8932 100644
--- a/Source/CTest/cmCTestP4.cxx
+++ b/Source/CTest/cmCTestP4.cxx
@@ -464,6 +464,7 @@ bool cmCTestP4::UpdateCustom(const std::string& custom)
cmSystemTools::ExpandListArgument(custom, p4_custom_command, true);
std::vector<char const*> p4_custom;
+ p4_custom.reserve(p4_custom_command.size() + 1);
for (std::string const& i : p4_custom_command) {
p4_custom.push_back(i.c_str());
}