Thomas Munro <thomas.munro@gmail.com> writes:
> On Tue, Oct 15, 2019 at 1:55 PM Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> and now prairiedog has shown it too:
>> https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=prairiedog&dt=2019-10-14%2021%3A45%3A47
>> which is positively fascinating, because prairiedog is running a
>> bronze-age version of macOS that surely never heard of APFS.
>> So this makes it look like this is a basic macOS bug that's not
>> as filesystem-dependent as one might think.
> Does https://github.com/macdice/unlinktest show the problem on that system?
It does, though with a very low frequency:
$ ./unlinktest
$ ./unlinktest 10000
read 0 bytes, unexpected
$ ./unlinktest 10000
read 0 bytes, unexpected
read 0 bytes, unexpected
$ ./unlinktest 10000
$
The failure rate on my recent-vintage laptop is more like one
failure every five loops.
regards, tom lane