From: Lars Ingebrigtsen <larsi@gnus.org>
Date: Sun, 06 Dec 2020 20:14:27 +0100
Cc: 13653@debbugs.gnu.org
Ken Brown <kbrown@cornell.edu> writes:
In the cygw32 build, start emacs in daemon mode:
$ emacs --daemon -Q
Now kill it from the terminal:
$ kill PID
The result is an Emacs Abort Dialog box saying a fatal error has
occurred and asking me if I want to attach a debugger. I have two
problems with this. First, a kill command shouldn't cause emacs to
abort. Second, I don't think the cygw32 build should ever pop up an
abort dialog box. None of the other emacs builds on Cygwin do this,
so it's surprising and confusing to users.
(This bug report unfortunately got no response at the time.)
Are you still seeing this problem in more recent Emacs versions?
Assuming that Ken says this is still an issue: how does 'kill' work in
its Cygwin version? Specifically, is it possible that it runs the
signal handler in a separate thread, like what Windows does with
SIGINT handlers of console programs if one types Ctrl-C? If so, I
think I know the reason and can describe the details; fixing that is
not trivial, to say the least.