Issue calling `Child.output()` on ubuntu-latest with `v1.8.0`

Description

We encountered an unexpected problem when using async-process on the ubuntu-latest environment in our CI workflow after it was updated to version v1.8.0 on September 25th.

The issue manifests as erratic behaviour in our code, primarily blocking, when we make calls to Child.output(). We would appreciate any assistance in troubleshooting and resolving it. If you need any further information or logs, please let us know.

Associated Issue: near/near-workspaces-rs#312

[taiki-e]

Thanks for the report, and sorry for the breakage! I've yanked 1.8.0.

cc @notgull

[notgull]

This might be the same issue as I've encountered in #54. It looks like it's missing the SIGCHLD signal somehow; not sure if this is an issue with async-signal or the new architecture. I'll find a minimal repro of this issue.

[notgull]

@shariffdev Can you re-run the tests with the latest master? I believe that smol-rs/async-signal#20 fixed this issue.