When no branch is given to the "--reflog" option, we resolve
HEAD to get the default branch. However, if HEAD points to
an unborn branch, resolve_ref returns NULL, and we later
segfault trying to access it.
Signed-off-by: Jeff King <peff@xxxxxxxx>
---
builtin/show-branch.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/builtin/show-branch.c b/builtin/show-branch.c
index 408ce70..092b59b 100644
--- a/builtin/show-branch.c
+++ b/builtin/show-branch.c
@@ -743,6 +743,8 @@ int cmd_show_branch(int ac, const char **av, const char *prefix)
fake_av[1] = NULL;
av = fake_av;
ac = 1;
+ if (!*av)
+ die("no branches given, and HEAD is not valid");
}
if (ac != 1)
die("--reflog option needs one branch name");
--
2.6.0.rc2.408.ga2926b9
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