RE: [BUG] Error adding 2+ files after init --shared on Windows with fscache

On 2021-03-12 at 21:14:00, brian m.carlson wrote:

On 2021-03-12 at 15:52:43, Steven Kelly wrote:

quoted

What did you do before the bug happened? (Steps to reproduce your

issue)

quoted

Clean install of Git on Windows 10 using default options
git init --shared
echo x>x
echo y>y
git add -A

What did you expect to happen? (Expected behavior)
The two files are added with no errors

What happened instead? (Actual behavior)
error: unable to create temporary file: No such file or directory
error: y: failed to insert into database
error: unable to index file 'y'
fatal: adding files failed

What's different between what you expected and what actually

happened?

quoted

The add command fails with an error 'unable to create temporary file'

Anything else you want to add:
If I omit --shared, there is no error
If there is only one file, there is no error
If the echo commands do not have characters, just adding a blank line,

there is no error

quoted

If I turn off fscache, there is no error (git config --global core.fscache false)

Seeing this definitely makes me think this should be reported to the Git
for Windows project (https://github.com/git-for-windows/git) because
that's a nonstandard option that's specific to Windows.  I don't think
anyone here (other, of course, than the Git for Windows folks) is
familiar with how that option works and since it isn't part of core Git
we wouldn't be able to fix it.

Thanks, duly reported: https://github.com/git-for-windows/git/issues/3110#issue-830551915
I note this bug does not occur in git version 2.9.3.windows.2 (2016) on Windows 10.0.18363.1316 with fscache
It seems to have existed since at least 2017: https://stackoverflow.com/a/44040893