iceweasel / cups with client.conf

giorgio.pioda@client8847:~$ gdb iceweasel
GNU gdb (Debian 7.7.1+dfsg-5) 7.7.1
Copyright (C) 2014 Free Software Foundation, Inc.
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Reading symbols from iceweasel...Reading symbols from /usr/lib/debug//usr/lib/iceweasel/iceweasel...done.
done.
(gdb) run
Starting program: /usr/bin/iceweasel
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffe9013700 (LWP 3270)]
[Thread 0x7fffe9013700 (LWP 3270) exited]

(process:3264): GLib-CRITICAL **: g_slice_set_config: assertion 'sys_page_size == 0' failed
[New Thread 0x7fffe9013700 (LWP 3272)]
[New Thread 0x7fffe1dff700 (LWP 3273)]
[New Thread 0x7fffe15fe700 (LWP 3274)]
[New Thread 0x7fffe1faf700 (LWP 3275)]
[New Thread 0x7fffe0dfd700 (LWP 3276)]
[New Thread 0x7fffe09f3700 (LWP 3277)]
[New Thread 0x7fffe0972700 (LWP 3278)]
[New Thread 0x7fffe08f1700 (LWP 3279)]
[New Thread 0x7fffe0870700 (LWP 3280)]
[New Thread 0x7fffe07ef700 (LWP 3281)]
[New Thread 0x7fffe076e700 (LWP 3282)]
[New Thread 0x7fffdf5ff700 (LWP 3283)]
[New Thread 0x7fffde966700 (LWP 3284)]
[New Thread 0x7fffde165700 (LWP 3285)]
[New Thread 0x7fffe0637700 (LWP 3286)]
[New Thread 0x7fffdd2ff700 (LWP 3287)]
[New Thread 0x7fffdc7ff700 (LWP 3288)]
[New Thread 0x7fffdbffe700 (LWP 3289)]
[New Thread 0x7fffdad3f700 (LWP 3290)]
[New Thread 0x7fffd97ff700 (LWP 3291)]
[New Thread 0x7fffd8ffe700 (LWP 3292)]
[New Thread 0x7fffd83ff700 (LWP 3293)]
[New Thread 0x7fffd7bfe700 (LWP 3294)]
[New Thread 0x7fffd73fd700 (LWP 3295)]
[New Thread 0x7fffd68ff700 (LWP 3296)]
[Thread 0x7fffdbffe700 (LWP 3289) exited]
[New Thread 0x7fffd64ff700 (LWP 3297)]
[Thread 0x7fffd7bfe700 (LWP 3294) exited]
[Thread 0x7fffd83ff700 (LWP 3293) exited]
[New Thread 0x7fffd5aff700 (LWP 3298)]
[Thread 0x7fffd73fd700 (LWP 3295) exited]
[New Thread 0x7fffd4fff700 (LWP 3299)]
[New Thread 0x7fffdbffe700 (LWP 3300)]
[New Thread 0x7fffd7bfe700 (LWP 3301)]
[New Thread 0x7fffd83ff700 (LWP 3302)]
[New Thread 0x7fffd73fd700 (LWP 3303)]
console.error:
  [CustomizableUI]
  Custom widget with id loop-button does not return a valid node
[New Thread 0x7fffd39ff700 (LWP 3304)]
[New Thread 0x7fffd31fe700 (LWP 3305)]
[Thread 0x7fffd31fe700 (LWP 3305) exited]
[Thread 0x7fffd39ff700 (LWP 3304) exited]
[New Thread 0x7fffd39ff700 (LWP 3306)]
[New Thread 0x7fffd31fe700 (LWP 3307)]
[New Thread 0x7fffd1cff700 (LWP 3308)]
[New Thread 0x7fffd12ff700 (LWP 3309)]
console.error:
  [CustomizableUI]
  Custom widget with id loop-button does not return a valid node
[New Thread 0x7fffd06ff700 (LWP 3310)]
[New Thread 0x7fffcfbff700 (LWP 3311)]
[New Thread 0x7fffcf3fe700 (LWP 3312)]
[New Thread 0x7fffcd8ff700 (LWP 3313)]
[New Thread 0x7fffcd0fe700 (LWP 3314)]
[New Thread 0x7fffd8747700 (LWP 3315)]
[New Thread 0x7fffcc4ff700 (LWP 3316)]
[New Thread 0x7fffcb9ff700 (LWP 3317)]
[New Thread 0x7fffcadff700 (LWP 3318)]
[New Thread 0x7fffca5fe700 (LWP 3319)]
[New Thread 0x7fffc995b700 (LWP 3320)]
[New Thread 0x7fffc915a700 (LWP 3321)]
[New Thread 0x7fffc82ff700 (LWP 3322)]
[New Thread 0x7fffc7afe700 (LWP 3323)]
[Thread 0x7fffc7afe700 (LWP 3323) exited]
[Thread 0x7fffd64ff700 (LWP 3297) exited]
[New Thread 0x7fffc7afe700 (LWP 3326)]
[New Thread 0x7fffd64ff700 (LWP 3327)]
[New Thread 0x7fffc5324700 (LWP 3328)]
[Thread 0x7fffc82ff700 (LWP 3322) exited]
[New Thread 0x7fffc82ff700 (LWP 3329)]
[New Thread 0x7fffc48ff700 (LWP 3330)]
[New Thread 0x7fffc40fe700 (LWP 3331)]
[Thread 0x7fffc5324700 (LWP 3328) exited]
[Thread 0x7fffc82ff700 (LWP 3329) exited]
[Thread 0x7fffc40fe700 (LWP 3331) exited]
[New Thread 0x7fffc5324700 (LWP 3333)]
[New Thread 0x7fffc40fe700 (LWP 3334)]
[New Thread 0x7fffc82ff700 (LWP 3335)]
[New Thread 0x7fffbdfeb700 (LWP 3336)]
[New Thread 0x7fffbd7ea700 (LWP 3337)]
[New Thread 0x7fffbcfe9700 (LWP 3338)]
[New Thread 0x7fffbc7e8700 (LWP 3339)]
[New Thread 0x7fffbb9ff700 (LWP 3340)]
[New Thread 0x7fffbb1fe700 (LWP 3341)]
[New Thread 0x7fffba9fd700 (LWP 3342)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffc5324700 (LWP 3333)]
__memmove_ssse3_back () at ../sysdeps/x86_64/multiarch/memcpy-ssse3-back.S:1574
1574    ../sysdeps/x86_64/multiarch/memcpy-ssse3-back.S: File o directory non esistente.