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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: Possible issue with mutexes
Date: Wed, 10 Apr 2019 17:27:52 +0300
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To: Herwig Hochleitner <herwig@bendlas.net>
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> From: Herwig Hochleitner <herwig@bendlas.net>
> Date: Wed, 10 Apr 2019 05:11:36 +0200
> 
> Waiting on a condition var or joining a thread on the main thread can 
> freeze emacs totally dead. Like kill -9 dead.
> 
> Is this a known issue or should I investigate further?

Not sure if I understand correctly the situation you describe.  Would
it be possible to post a simple reproducer?