Comment 1 for bug 1270073

with this when I close the inkscape it also crash.

here are some frame of gdb log.
#0 0x0012d422 in __kernel_vsyscall ()
#1 0x018c4651 in raise () from /lib/tls/i686/cmov/libc.so.6
#2 0x018c7a82 in abort () from /lib/tls/i686/cmov/libc.so.6
#3 0x018fb49d in ?? () from /lib/tls/i686/cmov/libc.so.6
#4 0x01905591 in ?? () from /lib/tls/i686/cmov/libc.so.6
#5 0x01906de8 in ?? () from /lib/tls/i686/cmov/libc.so.6
#6 0x01909ecd in free () from /lib/tls/i686/cmov/libc.so.6
#7 0x01801741 in operator delete(void*) () from /usr/lib/libstdc++.so.6
#8 0x08125e5d in sp_object_unref (object=0x8b62570, owner=0x8cf0098) at sp-object.cpp:336
#9 0x08126154 in sp_object_release (object=0x8cf0098) at sp-object.cpp:788
#10 0x0810c421 in sp_item_release (object=0x8cf0098) at sp-item.cpp:468
#11 0x0812577d in SPObject::releaseReferences (this=0x8cf0098) at sp-object.cpp:933
#12 0x080957bb in ~SPDocument (this=0x8dbaf60, __in_chrg=<value optimized out>) at document.cpp:167