Hi,
I hope this is the right place to post the discussion like this, as I
can confirm the test failed reason is not related to vim and it's quite
hard for me to track the issue alone. I think some discussion will be
helpful to solve the issue.
In the build log[0]:
```
>From test_channel.vim:
Found errors in Test_keep_pty_open():
Run 1, 13:51:24 - 13:51:24 in 0.020000 seconds:
command line..script
/<<PKGBUILDDIR>>/src/vim-gtk3/testdir/runtest.vim[617]..function
RunTheTest[57]..Test_keep_pty_open line 6: Expected range 200 - 1000, but got 20
Run 2, 13:51:26 - 13:51:26 in 0.030000 seconds:
command line..script
/<<PKGBUILDDIR>>/src/vim-gtk3/testdir/runtest.vim[658]..function
RunTheTest[57]..Test_keep_pty_open line 6: Expected range 200 - 1000, but got 30
Run 3, 13:51:30 - 13:51:30 in 0.030000 seconds:
command line..script
/<<PKGBUILDDIR>>/src/vim-gtk3/testdir/runtest.vim[658]..function
RunTheTest[57]..Test_keep_pty_open line 6: Expected range 200 - 1000, but got 30
Flaky test failed too often, giving up
```
The test source code (in vim script):
```
func Test_keep_pty_open()
CheckUnix
let job = job_start(s:python . ' -c "import time;time.sleep(0.2)"',
\ {'out_io': 'null', 'err_io': 'null', 'pty': 1})
let elapsed = WaitFor({-> job_status(job) ==# 'dead'})
call assert_inrange(200, 1000, elapsed)
call job_stop(job)
endfunc
```
The `let job = job_start...` command in Debian Hurd can be represented using
the following command:
```
let job = job_start('python3' . ' -c "import time;time.sleep(0.2)"', {'out_io':
'null', 'err_io': 'null', 'pty': 1})
```
When I run the vim command with running `vim --log vimlog`, I saw the
following log:
```
...
5.790000 : Starting job: python3 -c import time;time.sleep(0.2)
5.800000 on 0: Created channel
5.800000 on 0: using pty /dev/ttyp5 on fd 4
5.800000 : SafeState: Start triggering
5.800000 : raw terminal output: <messy stuff...>
5.800000 : looking for messages on channels
5.800000 on 0: Closing channel because all readable fds are closed
5.800000 on 0: Closing channel
5.800000 : SafeState: back to waiting, triggering SafeStateAgain
5.800000 : closing logfile vimlog
5.810000 : looking for messages on channels
5.810000 on 0: Job ended
...
```
It's still the case with different sleep times. I believe the issue is
related to:
```
5.800000 on 0: Closing channel because all readable fds are closed
5.800000 on 0: Closing channel
```
but I have no idea where to go next.
[0]:
https://buildd.debian.org/status/fetch.php?pkg=vim&arch=hurd-i386&ver=2%3A9.1.0967-2&stamp=1736521254&raw=0
Best,
Zhaoming
