receive-pack: crash when checking with non-exist HEAD

diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c
index c3230817db4a7676eb74335b254f30597e66edd9..2380127c91db0ff0a6cb56995c03ea9bc0b52c77 100644 (file)
--- a/builtin/receive-pack.c
+++ b/builtin/receive-pack.c
@@ -514,7 +514,7 @@ static const char *update(struct command *cmd, struct shallow_info *si)
                        return "deletion prohibited";
                }
 
-               if (!strcmp(namespaced_name, head_name)) {
+               if (head_name && !strcmp(namespaced_name, head_name)) {
                        switch (deny_delete_current) {
                        case DENY_IGNORE:
                                break;