Re: v2.47.0-rc1 test failure on cygwin

[Patrick Steinhardt <ps@pks.im>]

On Fri, Oct 04, 2024 at 09:09:01AM -0700, Junio C Hamano wrote:
> Johannes Schindelin <Johannes.Schindelin@gmx.de> writes:
> 
> >> But unfortunately this still caused permission errors when the new path
> >> was held open by another process.
> >
> > Yes, this will _always_ be a problem, I think. The
> > `FILE_RENAME_POSIX_SEMANTICS` as per its documentation should help, but if
> > it does not in your tests it might actually not quite work as advertised
> > (wouldn't be the first time I encounter such an issue).
> >
> > I tried to read through the code (it's a lot!) to figure out whether there
> > is potentially any situation when the `tables.list` file is opened but not
> > closed immediately, but couldn't find any. Do you know off-hand of any
> > such scenario?
> >
> >> I think for now I'd still lean into the direction of adding the !WINDOWS
> >> prerequisite to the test and increasing timeouts such that I can
> >> continue to investigate without time pressure.
> >
> > Let me bang my head against this problem for a little while longer. You
> > might be right, though, that this is a thing we cannot fix in time for
> > v2.47.0, which would be sad.
> 
> If you folks think it would help stabilizing the tentative fix, I am
> open to the idea of delaying the 2.47 by a few days.  Currently the
> 2.47-final is scheduled on the 7th (Monday), but we can do 2.47-rc2
> on that day instead, and move the final to 10th (Thu) or 11th (Fri)
> [*].
> 
> Thanks, all, for working together.
> 
> 
> [Footnote]
> 
>  * All dates are US/Pacific, 10:00 am

Right now I don't yet have a good idea for how to fix the issue. I've
been trying a bunch of different things that, according to Windows docs,
should've made the renames work. But they didn't, and I don't really
have an alternative right now. So I'll need to keep on thinking about
this, and maybe get some more help from people familiar with Windows.

So deferring Git 2.47 because of it probably does not make much sense
unless somebody can up with a solution. Also, as noted already, this is
not a regression, the behaviour actually improved even on Windows. Not
to the degree I was hoping for, but at least a bit. So that's another
reason why I don't think it is worth deferring over this.

Thanks!

Patrick