Pantsd doesn't properly close its output in some way

[illicitonion]

The following works fine and exits:

cat <(./pants --no-pantsd list 3rdparty:: >/dev/null)

The following hangs forever, never closing the fd:

cat <(./pants --pantsd list 3rdparty:: >/dev/null)

This makes it hard to use pants's more query-ish goals (like dependencies and dependees) in scripts.

[illicitonion]

@kwlzn You have been gaining a dangerous amount of experience in this corner of the world...

[kwlzn]

thanks for the repro, will take a look

[stuhood]

FTR, this looks like a client hang. Killing the server while a run is hung has no effect.

Will likely be fixed by #9402.

[thejcannon]

I just tried this on Pants main and the command exited normally. Going to close