refs: print error message in debug output

Signed-off-by: Han-Wen Nienhuys <hanwen@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>

Han-Wen Nienhuys committed Dec 22, 2021 at 18:11 UTC a6db572af6bc792590716856d80e8b9c02a55bec
1 file changed +2 -1
refs/debug.c
+2 -1
@@ -47,7 +47,8 @@ static int debug_transaction_prepare(struct ref_store *refs,
47 transaction->ref_store = drefs->refs;
48 res = drefs->refs->be->transaction_prepare(drefs->refs, transaction,
49 err);
50 - trace_printf_key(&trace_refs, "transaction_prepare: %d\n", res);
50 + trace_printf_key(&trace_refs, "transaction_prepare: %d \"%s\"\n", res,
51 + err->buf);
52 return res;
53 }
54