Supervisor got noproc (looks like a bug)

[Maria Scott]

> It seems like, the behaviour of the monitor should be changed somehow,

I don't think the general working of monitors can be changed easily, and not without causing far-reaching repercussions =\

> and the code https://github.com/erlang/otp/blob/0bad25713b0bc4a875e9ef7d9b1abcb6a2f75061/lib/stdlib/src/supervisor.erl#L957-L982
> seems a little bit outdated due to the async nature of the monitors
> and such tricky race, also, it's 12 years old... :)

Most of the supervisor code is old/old-fashioned, I had my hands in there not too long ago ^^; That said, as it is a very central component to OTP, there is understandably some reluctance to change the battle-tested-by-time old code just for the sake of following the latest trends ;)

> I would like to see, what others add OTP maintainers thinks about this
> behaviour?

Open an issue at https://github.com/erlang/otp? That's more likely to catch their attention than the mailing list ;)

Regards,
Maria