cntr hangs under NixOS test

[JJJollyjim]

Not familiar with cntr, so I don't have much to add other than what I said in the workaround Nixpkgs pr… the fix was to make output not be a tty, and when I straced the pre-fix cntr invocation in the NixOS test, it hung right after some tty-related ioctls and I believe it had just received SIGWINCH. Didn't catch the actual call it was stuck on unfortunately.

[JJJollyjim]

Ah, found it in my scrollback

log.txt

[Mic92]

There is a code path for sigwhinch as well. So this could be a potential cause.