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Re: another unhelpful backtrace from redisplay-internal

From: Eli Zaretskii
Subject: Re: another unhelpful backtrace from redisplay-internal
Date: Sat, 07 Mar 2020 18:14:22 +0200

> From: Madhu <address@hidden>
> Date: Sat, 07 Mar 2020 21:02:36 +0530
> I have a sure recipe for a crash in recent emacs but the configuration
> is complex and I'm afraid I don't have a simple test case. I'm posting
> the initial backtrace here in case anyone can suggest things I should
> look for, or some ways I could narrow it down.

"Recent emacs" from which branch of the repository?  Also, how recent?

(Crashes should be reported with "M-x report-emacs-bug", as there's no
doubt they are bugs of some sort, and therefore no reason to discuss
them here.  Using report-emacs-bug would have included all the
information I'm asking about above, automatically.)

> Emacs is compiled with -g3 -O2, and I'm not sure if all the info to
> debug this is available.

The backtrace shows incorrect files and lines, and most values are
"optimized out" (and others are therefore suspect to not be the

> Any suggestions please?

Rebuild without optimizations and try reproducing the problem with
your recipe.  If successful, post the backtrace.


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