feh segfaults on jpeg rotation if jpegexiforient is not installed

[vesath]

On an up-to-date Arch Linux system, not having jpegexiforient installed, feh segfaults if I open any jpeg and rotate it by pressing "<".

Here is the relevant GDB output:

feh WARNING: lossless rotate: Failed to exec jpegexiforient: No such file or directory
feh WARNING:
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff6701da8 in vfprintf () from /usr/lib/libc.so.6
(gdb) bt
#0  0x00007ffff6701da8 in vfprintf () from /usr/lib/libc.so.6
#1  0x00007ffff67b0250 in __vsnprintf_chk () from /usr/lib/libc.so.6
#2  0x0000000000409cfc in ?? ()
#3  0x000000000040bb76 in ?? ()
#4  0x000000000040bd7a in ?? ()
#5  0x000000000040f477 in ?? ()
#6  0x000000000040f9d1 in ?? ()
#7  0x0000000000405b3a in ?? ()
#8  0x00007ffff66d8725 in __libc_start_main () from /usr/lib/libc.so.6
#9  0x0000000000405c0d in ?? ()

Indeed, commenting out line 524 of imlib.c "vsnprintf(errstr, 1024, fmt, args);" prevents feh from crashing.

This bug is tracked on Arch Linux there: https://bugs.archlinux.org/task/31699
Although I haven't had the time to go any further than the above yet.

[derf]

Whoops. My bad, I forgot a printf argument so feh/imlib got sent into memory nirvana. This issue is fixed in feh 2.6.3.

[vesath]

Thanks a lot for looking into that so quickly!