Re: Emacs trunk crash

[Eli Zaretskii <eliz@gnu.org>]

> From: Fabrice Popineau <fabrice.popineau@gmail.com>
> Date: Fri, 20 Mar 2015 23:21:41 +0000 (UTC)
> 
> Just got a crash with emacs/trunk/w64. The emacs used to debug this has been 
> compiled unoptimized.
> I wanted to let the mailing list know in case there is something to fix here.
> The backtrace is:
> 
> (gdb) where
> #0  0x000000040024ba41 in substitute_object_recurse (object=107071061, 
> placeholder=8607363, subtree=3)
>     at ../../emacs/src/lread.c:3306
> #1  0x000000040024b9ae in substitute_object_recurse (object=107071061, 
> placeholder=8607363,
>     subtree=107071061) at ../../emacs/src/lread.c:3299
> #2  0x000000040024b777 in substitute_object_in_subtree (object=107071061, 
> placeholder=8607363)
>     at ../../emacs/src/lread.c:3234
> #3  0x000000040024a58e in read1 (readcharfun=197175989, pch=0x8358bc, 
> first_in_list=false)
>     at ../../emacs/src/lread.c:2847

A fuller backtrace, including "xbacktrace" for the Lisp part, might
show some useful information.

Also, can you show the Lisp object being read here?

> This is the consequence of an unattented shutdown of my machine with a long 
> emacs session running. I'm not sure I'll be able to reproduce it at all. But for 
> the time being, I'm unable to restart my session. Emacs is crashing while 
> restoring one of the files of my session.

What kind of file is the file that causes the crash?  is it a Lisp
file?