am: release strbuf on error return in hg_patch_to_mail()

diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c
index 136c44def778fa64a4a79074413d08aeedcb7991..52c63ebfdc737688a7d99f6be34c43cf80b1d011 100644 (file)
--- a/builtin/receive-pack.c
+++ b/builtin/receive-pack.c
@@ -23,6 +23,7 @@
 #include "fsck.h"
 #include "tmp-objdir.h"
 #include "oidset.h"
+#include "packfile.h"
 
 static const char * const receive_pack_usage[] = {
        N_("git receive-pack <git-dir>"),
@@ -1138,7 +1139,7 @@ static const char *update(struct command *cmd, struct shallow_info *si)
                }
                if (ref_transaction_delete(transaction,
                                           namespaced_name,
-                                          old_oid->hash,
+                                          old_oid ? old_oid->hash : NULL,
                                           0, "push", &err)) {
                        rp_error("%s", err.buf);
                        strbuf_release(&err);