Comment by chubot

FWIW here is another piece of trivia about job control: the API means you can't spawn a child process "safely" in POSIX -- you have to trust that that the executable you're spawning is well-behaved (or use more advanced Linux process isolation)

In this case it was the Zed editor spawning the zsh shell:

How to Lose Control of your Shell - https://registerspill.thorstenball.com/p/how-to-lose-control...

zsh has a bug where it doesn't do the job control cleanup properly in some cases -- when fork-exec() optimizations happen.

This can mess up the calling process. For example, here you could no longer kill Zed by hitting Ctrl-C, even after zsh is done.

My comment: https://lobste.rs/s/hru0ib/how_lose_control_your_shell#c_dfl...