On Thu, Mar 09, 2017 at 10:42:17AM -0700, Ivan Andrus wrote:
> I switched out of Emacs to check my email and when I came back it had
> crashed.  I had been byte-compiling some files and doing random work
> before that, but everything seemed to work okay.  I just built from source
> yesterday so my uptime wasn't very high.

I think this is because of the changes to event handling that I’ve
made recently to solve the concurrency issues. Unfortunately I don’t
know how we could go about debugging it properly since the crash
happens deep inside Cocoa libraries.

I’ve attached a patch which I hope might prevent the crash, though. Can
you give it a go and see if the crash repeats, please?

The alternative is to revert commits a65236214d and 3bd2e9e975, which
should take you back to the previous code.

> I build with a few patches, though only elisp changes with the
> exception of the patch from bug 16579 which should only affect
> proced which I haven't at all in this instance.

According to https://debbugs.gnu.org/cgi/bugreport.cgi?bug=16579
that patch was committed to master some time ago.

Thanks for the report.
-- 
Alan Third