Subject: Re: bug#38748: 28.0.50; crash on MacOS 10.15.2

From: Eli Zaretskii <[email-masked]>
Date: Wed, 08 Jan 2020 21:58:42 +0200

> From: Pip Cet <[email-masked]>
> Date: Wed, 8 Jan 2020 19:18:15 +0000
> Cc: Eli Zaretskii <[email-masked]>, [email-masked], [email-masked], 
> 	Andrii Kolomoiets <[email-masked]>, [email-masked]
> 
> > Yes. Iʼll note that when this happens there are over 9000 stackframes,
> > so perhaps itʼs stack exhaustion. macOS has a default stack of 8192
> > kB, Iʼll see if increasing it helps.
> 
> That does sound like infinite recursion, or infinite recursion waiting
> for something to change asynchronously that breaks the loop.

No, GC is known to take many thousands of recursive calls to
mark_object.  9000 is not a particularly high number, and doesn't
necessarily signal infinite recursion.