Leave a branch spelled like an option out of the switcher

Such a name is refused as a head before git could read it as an
option, and the fallback branch already skips it, so the switcher
offered a choice that led only to an error page.

1 file changed, 4 insertions, 0 deletions

diff --git a/source/ui-shared.c b/source/ui-shared.c
index 147472e..3970c58 100644
--- a/source/ui-shared.c
+++ b/source/ui-shared.c
@@ -480,6 +480,10 @@ static int print_branch_option(const struct reference *ref, void *data)
 	// The switcher runs on every page, so it is bounded like the refs list.
 	if (ctx.cfg.max_ref_count && opt->count >= ctx.cfg.max_ref_count)
 		return -1;
+	// A name spelled like an option is refused as a head, so offering it
+	// would only lead to an error page.
+	if (name[0] == '-')
+		return 0;
 	opt->count++;
 	html_option(name, name, opt->selected);
 	return 0;