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-rw-r--r--builtin/show-branch.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/builtin/show-branch.c b/builtin/show-branch.c
index b1b540f7f6..934e514944 100644
--- a/builtin/show-branch.c
+++ b/builtin/show-branch.c
@@ -604,6 +604,7 @@ static int parse_reflog_param(const struct option *opt, const char *arg,
{
char *ep;
const char **base = (const char **)opt->value;
+ BUG_ON_OPT_NEG(unset);
if (!arg)
arg = "";
reflog = strtoul(arg, &ep, 10);