Here is the GDB output:
Reading symbols from transmission-gtk...
(No debugging symbols found in transmission-gtk)
(gdb) run
Starting program: /usr/bin/transmission-gtk
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7ffff492d700 (LWP 21496)]
[New Thread 0x7fffeffff700 (LWP 21497)]
[New Thread 0x7fffef7fe700 (LWP 21498)]
[New Thread 0x7fffeeffd700 (LWP 21499)]
[New Thread 0x7fffee67a700 (LWP 21500)]
[New Thread 0x7fffede79700 (LWP 21501)]
[New Thread 0x7fffd64e6700 (LWP 21505)]
[New Thread 0x7fffd5ce5700 (LWP 21506)]
[Thread 0x7fffd5ce5700 (LWP 21506) exited]
[New Thread 0x7fffd5ce5700 (LWP 21507)]
[New Thread 0x7fffd5211700 (LWP 21508)]
[New Thread 0x7fffd4a10700 (LWP 21509)]
[New Thread 0x7fffc7fff700 (LWP 21510)]
[New Thread 0x7fffc77fe700 (LWP 21511)]
[New Thread 0x7fffc6ffd700 (LWP 21512)]
[New Thread 0x7fffc67fc700 (LWP 21513)]
[New Thread 0x7fffc5ffb700 (LWP 21514)]
[Thread 0x7fffc67fc700 (LWP 21513) exited]
[Thread 0x7fffd4a10700 (LWP 21509) exited]
[Thread 0x7fffd5ce5700 (LWP 21507) exited]
[Thread 0x7fffc5ffb700 (LWP 21514) exited]
[Thread 0x7fffd5211700 (LWP 21508) exited]
[Thread 0x7fffc6ffd700 (LWP 21512) exited]
[Thread 0x7fffc77fe700 (LWP 21511) exited]
[Thread 0x7fffc7fff700 (LWP 21510) exited]
[Thread 0x7fffeffff700 (LWP 21497) exited]
[New Thread 0x7fffeffff700 (LWP 22289)]
[New Thread 0x7fffc7fff700 (LWP 22290)]
[Thread 0x7fffc7fff700 (LWP 22290) exited]
[Thread 0x7fffeffff700 (LWP 22289) exited]
*** invalid %N$ use detected ***
--Type <RET> for more, q to quit, c to continue without paging--
Thread 1 "transmission-gt" received signal SIGABRT, Aborted.
__GI_raise (sig=<optimized out>) at ../sysdeps/unix/sysv/linux/raise.c:50
50 ../sysdeps/unix/sysv/linux/raise.c: Aucun fichier ou dossier de ce type.
(gdb) quit
A debugging session is active.
Inferior 1 [process 21492] will be killed.
Quit anyway? (y or n) y
