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"corrupted size vs. prev_size"
From: |
Lars Ingebrigtsen |
Subject: |
"corrupted size vs. prev_size" |
Date: |
Tue, 12 Apr 2022 12:59:38 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) |
After the recent GIF/WebP caching changes, I sometimes get "corrupted
size vs. prev_size" and Emacs then hangs, so I guess I'm messing up
something in the memory allocation/freeing/writing bits somewhere.
But I'm getting it very, very rarely -- like one out of every thirty
times with a bunch of WebP/GIF images, so it's hard to track down.
Connecting to the hung Emacs isn't very informative:
(gdb) info threads
Id Target Id Frame
* 1 Thread 0x7f303a430000 (LWP 84136) "emacs" 0x00007f303d54e1f3 in
__pselect (nfds=22, readfds=0x7ffd058d69e0, writefds=0x7ffd058d6a60,
exceptfds=0x0, timeout=0x7ffd058d6800, sigmask=<optimized out>)
at ../sysdeps/unix/sysv/linux/pselect.c:52
2 Thread 0x7f3039229640 (LWP 84137) "gmain" 0x00007f303d54b87f in
__GI___poll (fds=0x561b63028870, nfds=2, timeout=-1)
at ../sysdeps/unix/sysv/linux/poll.c:29
3 Thread 0x7f303898c640 (LWP 84138) "gdbus" 0x00007f303d54b87f in
__GI___poll (fds=0x561b63452d20, nfds=3, timeout=-1)
at ../sysdeps/unix/sysv/linux/poll.c:29
4 Thread 0x7f3033fff640 (LWP 84139) "dconf worker" 0x00007f303d54b87f in
__GI___poll (fds=0x561b634be7d0, nfds=1, timeout=-1)
at ../sysdeps/unix/sysv/linux/poll.c:29
I've stared at the code for some time now to see whether I can track the
problem down that way -- perhaps I've got some lifetime issues;
deallocating webp iterators twice, for instance, or something similar in
the gif code. Does anybody else see something obviously wonky in that
code in gif_load or webp_load?
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
- "corrupted size vs. prev_size",
Lars Ingebrigtsen <=
Re: "corrupted size vs. prev_size", Eli Zaretskii, 2022/04/12