Re: [BUG?] 'git describe seen'?

["SZEDER Gábor" <szeder.dev@gmail.com>]

On Sat, Apr 17, 2021 at 04:45:59PM -0700, Junio C Hamano wrote:
> This does not seem a new problem at all, as v2.10.0 thru more recent
> versions of "git describe" seem to give me the same answer.
> 
> Anyway, I am seeing a curious symptom.
> 
> $ git rev-list --count v2.31.0..seen
> 716
> $ git rev-list --count v2.31.1..seen
> 687
> 
> The above means that 'seen' is closer to v2.31.1 than v2.31.0; there
> are fewer commits that are not in v2.31.1 that are in 'seen', than
> commits that are not in v2.31.0 that are in 'seen'.  
> 
> That is naturally expected.
> 
> $ git rev-list --count v2.31.0..v2.31.1
> 29
> 
> And that difference of 29 matches the difference, which is 716 - 687.
> 
> But here is what is puzzling.
> 
> $ git describe seen
> v2.31.0-716-g7b65b53281
> 
> $ git rev-list --first-parent master..seen |
>   while read v
>   do
> 	d=$(git describe $v)
> 	echo $v $d
> 	case "$d" in v2.31.1-*) break ;; esac
>   done
> 7b65b53281ae06ee25dd47dead4062125eb54427 v2.31.0-716-g7b65b53281
> eec14f0fec886c909a29d63a94537df5a62be618 v2.31.0-714-geec14f0fec
> ...
> 103835562c64abef2319995716230f92092f87af v2.31.0-569-g103835562c
> d4324831d9152b16e091646e22a6e03423a59c93 v2.31.1-516-gd4324831d9
> 
> Is there something tricky about the topic merged at 10383556 (Merge
> branch 'jh/rfc-builtin-fsmonitor' into seen, 2021-04-17) to confuse
> the counting done in "git describe"?

Subsequent merges with identical timestamps can easily confuse 'git
describe', I wonder whether this is another symptom of the issue
reported at:

  https://public-inbox.org/git/20191008123156.GG11529@szeder.dev/