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-rw-r--r--Source/cmOptionCommand.cxx2
1 files changed, 1 insertions, 1 deletions
diff --git a/Source/cmOptionCommand.cxx b/Source/cmOptionCommand.cxx
index 2c4a774..ec54fc5 100644
--- a/Source/cmOptionCommand.cxx
+++ b/Source/cmOptionCommand.cxx
@@ -34,7 +34,7 @@ bool cmOptionCommand(std::vector<std::string> const& args,
switch (policyStatus) {
case cmPolicies::WARN:
checkAndWarn = (existsBeforeSet != nullptr);
- break;
+ CM_FALLTHROUGH;
case cmPolicies::OLD:
// OLD behavior does not warn.
break;