Bogus exit code 127 from a child process

[Dimitry Andric]

On 17 Mar 2024, at 13:35, Takashi Yano via Cygwin <cygwin@cygwin.com> wrote:
...
> 
> I also test your test case:
> while bash -c 'true & true & wait -n || { echo 1: $?; exit 1; } && wait -n || { echo 2: $?; exit 1; }'; do echo $((i++)); done
> in Linux (Debian 12.5), and the issue reproduced!

Yeah, same here with bash 5.1.16(1)-release on Ubuntu 22.04. It errors out with 127 after ~50-200 loops.

-Dimitry