Re: intervals.c:1190: Emacs fatal error: assertion failed: amt == 0

[Eli Zaretskii]

> Date: Fri, 03 Apr 2020 15:27:21 +0200 (CEST)
> Cc: address@hidden
> From: Werner LEMBERG <address@hidden>
> 
> > Thanks.  Any hope of having a reproducible recipe that doesn't
> > involve that particular message and/or mew?
> 
> Alas, no.  I'm willing to help with further analysis if you tell me
> what to do.
> 
> I'm attaching the problematic e-mail; however, I decoded it with
> 'munpack -t' and also with a small perl script to get the header lines
> in standard UTF8, and Emacs was able to read this data just fine.
> 
> For bisecting the issue, what date or commit do you suggest as the
> starting point for testing?
> 
> > Alternatively, does reverting
> > dc3006cf1419e5b22c35fa36d79ba029d0482df1 make this problem go away?
> 
> No, it doesn't.

How about 31182c1d17f6f7bc946d5e4576e025c9b975e0b5?

If that doesn't help, either, I guess start from the branch point of
emacs-27, and if that version also exhibits the problem, try Emacs
26.3.

Thanks.