Message 368549 - Python tracker

> this seems like an awful lot of energy to spend on some code
that's not even used by default.

True, but it seems likely to me that this signals :) a deeper, more general issue about CPython / signals (which is why I spent time on it). For example, my reproducer script doesn't use MultiLoopWatcher. I'd like to see if it can be reproduced with signals other than SIGCHLD, too.