RE: [ANNOUNCE] Git v2.32.0-rc1 - Defect in t0301.3, t1092.6, t5300

>On Tue, May 25, 2021 at 09:17:40AM -0400, Randall S. Becker wrote:
>> On May 24, 2021 6:44 PM, Taylor Blau wrote:
>> >To: Randall S. Becker <rsbecker@nexbridge.com>
>> >Cc: 'Junio C Hamano' <gitster@pobox.com>; 'Jean-Noël AVILA'
>> ><jn.avila@free.fr>; git@vger.kernel.org
>> >Subject: Re: [ANNOUNCE] Git v2.32.0-rc1 - Defect in t0301.3, t1092.6,
>> >t5300
>> >
>> >On Mon, May 24, 2021 at 06:37:29PM -0400, Randall S. Becker wrote:
>> >> On running the test suite on NonStop, t1092 fails in subtest 6 -
>> >> but not when run with --verbose and -x, so I can't supply a log.
>> >> This may be timing related. I wanted to report this in case anyone
>> >> had any insight on whether there are any possible transient vulnerabilities.
>> >
>> >The failure in t1092 sounds should be addressed by
>> >
>> >
>> > https://lore.kernel.org/git/pull.960.git.1621886108515.gitgitgadget@
>> > gmail.com/
>> >
>> >> t0301.3 often has transient failures - which has been experienced
>> >> for a while. Most importantly, t5300 continues to fail completely
>> >> on the
>> >> x86 platform, but not ia64, which I previously reported.
>> >
>> >Not sure about these, though.
>>
>> Thanks will wait for the roll on that one. We had one loggable transient failure in t1096.15:
>>
>> expecting success of 1092.15 'merge with outside renames':
>>         init_repos &&
>>
>>         for type in out-to-out out-to-in in-to-out
>>         do
>>                 test_all_match git reset --hard &&
>>                 test_all_match git checkout -f -b merge-$type update-deep &&
>>                 test_all_match git merge -m "$type" rename-$type &&
>>                 test_all_match git rev-parse HEAD^{tree} || return 1
>>         done
>>
>> + init_repos
>> Updating files: 100% (14/14), done.
>> HEAD is now at 5d0e8a6 initial commit
>> Updating files: 100% (14/14), done.
>> HEAD is now at 5d0e8a6 initial commit
>> Updating files: 100% (14/14), done.
>> HEAD is now at 5d0e8a6 initial commit
>> Updating files: 100% (10/10), done.
>> Updating files: 100% (7/7), done.
>> Updating files: 100% (10/10), done.
>> Updating files: 100% (7/7), done.
>> + test_all_match git reset --hard
>> + test_all_match git checkout -f -b merge-out-to-out update-deep
>> + test_all_match git merge -m out-to-out rename-out-to-out
>> --- full-checkout-err   2021-05-24 22:49:44 +0000
>> +++ sparse-checkout-err 2021-05-24 22:49:50 +0000
>> @@ -1 +0,0 @@
>> Updating files: 100% (5/5), done.
>> + return 1
>> error: last command exited with $?=1
>I'm having trouble reading this: is 'return 1' part of the output written to sparse-checkout-err?

>In either case, the "updating files" progress meter is coming from unpack-trees.c:get_progress(). Looking a little further:
>
>  - get_progress() is called by check_updates(), which is called by
>    unpack_trees() and update_sparsity()
>
>  - update_sparsity() is called by the sparse-checkout builtin, which
>    sets 'o.verbose_update = isatty(2)', so that caller is good.
>
>  - 'git merge' is the last command invoked by t1092.15, and it calls
>    unpack_trees() from 'builtin/merge.c:read_tree_trivial()', and sets
>    'opts.verbose_update = 1'.
>
>Stolee's patch to set GIT_PROGRESS_DELAY=-1 will obviously take care of this, but we should probably apply something like this on top
>(and maybe look further at other callers of unpack_trees() to make sure they set opts.verbose_update correctly; I stopped after I found the
>problem here).
>diff --git a/builtin/merge.c b/builtin/merge.c index eddb8ae70d..5f926d3edc 100644
>--- a/builtin/merge.c
>+++ b/builtin/merge.c
>@@ -677,7 +677,7 @@ static int read_tree_trivial(struct object_id *common, struct object_id *head,
> 	opts.src_index = &the_index;
> 	opts.dst_index = &the_index;
> 	opts.update = 1;
>-	opts.verbose_update = 1;
>+	opts.verbose_update = isatty(2);
> 	opts.trivial_merges_only = 1;
> 	opts.merge = 1;
> 	trees[nr_trees] = parse_tree_indirect(common);