Re: [PATCH] compat/winansi: fix die_lasterr() argument formatting

From: Johannes Sixt <j6t@kdbg.org>
Date: Sep 21, 2026, 04:06 UTC
Message-ID: <9c1cde3d-92c4-4684-834e-bae97fd33f5f@kdbg.org>
In-Reply-To: <CAEs0Zp4LK1ZHkL0tdi_k_=-u86HVm07FzyOJdO-=+DY9c3ZrYA@mail.gmail.com>

Am 21.09.26 um 05:00 schrieb Yongqiang Tian:

Show 13 quoted lines

> 3. Remove die_lasterr() and report GetLastError() directly at those
>    call sites. This avoids the va_list forwarding, allocation, and
>    errno conversion altogether.
> 
> The third direction now seems the simplest to me. It also follows
> existing Windows-specific code in Git that reports GetLastError()
> directly, for example:
> 
> https://github.com/git/git/blob/9a0c4701dcd5725c4184599322b52933ff5005ca/compat/win32/syslog.c#L10-L13
> 
> and:
> 
> https://github.com/git/git/blob/9a0c4701dcd5725c4184599322b52933ff5005ca/compat/fsmonitor/fsm-listen-win32.c#L106-L109

Sounds reasonable to me.

> -               die_lasterr("DuplicateHandle(%li) failed",
> -                       (long) (intptr_t) hnd);
> +               die("DuplicateHandle(%p) failed: Windows error %lu",
> +                   (void *)hnd, GetLastError());

But please leave the conversion to %p for another time.

Concerning the text "Windows error", please follow existing practice.

-- Hannes