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emacs hang fix


Just a heads up: I am debugging a hang problem in Cygwin that emacs seems
to trigger. It might be the same problem you are seeing, in which case it's
not an emacs problem. If you have the same problem I do, when you
run strace on a hung emacs you will see it in an infinite loop trying
to deal with signal 20 (SIGCHLD).

I tracked this down to a bug in the Cygwin DLL. The fix is easy -- it's a one-liner in the source code. I assume it will be in an upcoming Cygwin DLL release. -- Joe Buehler



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