From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?UTF-8?Q?Court=C3=A8s?=)
Subject: bug#33100: [libssh] fatal: dumb http transport does not support
	shallow capabilities
Date: Wed, 24 Oct 2018 23:33:03 +0200
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To: Leo Famulari <leo@famulari.name>
Cc: 33100-done@debbugs.gnu.org, Maxim Cournoyer <maxim.cournoyer@gmail.com>

Leo Famulari <leo@famulari.name> skribis:

> On Wed, Oct 24, 2018 at 09:01:07AM -0400, Maxim Cournoyer wrote:
>> From 06ba66d1949ba59573518f471ad3cbacefea6ea2 Mon Sep 17 00:00:00 2001
>> From: Maxim Cournoyer <maxim.cournoyer@gmail.com>
>> Date: Wed, 24 Oct 2018 08:49:50 -0400
>> Subject: [PATCH] build: git-fetch: Print message when falling back to a =
full
>>  checkout.
>>=20
>> Otherwise the user might believe that git-fetch stalled, observing the l=
ack of
>> output following a 'fatal' git error message (see:
>> https://debbugs.gnu.org/33100).
>>=20
>> * guix/build/git.scm (git-fetch): Print message when falling back to a f=
ull
>> checkout.
>
> I like it, but it doesn't seem to actually print anything for me when I
> trigger the failing case, for example by fetching the libssh source over
> HTTP.

If might be that current-output-port is fully buffered.  What if you
add:

  (setvbuf (current-output-port) 'line)

before the =E2=80=98format=E2=80=99 call?

Thanks,
Ludo=E2=80=99, who is found guilty of not actually running the code.