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Thread 1 (process 7546):
#0  0xffffe400 in __kernel_vsyscall ()
#1  0xb79c8f13 in write () from /lib/tls/i686/cmov/libc.so.6
#2  0xb796a3a4 in _IO_file_write () from /lib/tls/i686/cmov/libc.so.6
#3  0xb796a085 in ?? () from /lib/tls/i686/cmov/libc.so.6
#4  0xb796a320 in _IO_file_xsputn () from /lib/tls/i686/cmov/libc.so.6
#5  0xb7960caf in fwrite () from /lib/tls/i686/cmov/libc.so.6
#6  0x0805d33b in x11_ctrl_alt_backspace ()
#7  0xb7c091ad in _XIOError () from /usr/lib/libX11.so.6
#8  0xb7c0fab8 in _XGetXCBBuffer () from /usr/lib/libX11.so.6
#9  0xb7c0fc94 in ?? () from /usr/lib/libX11.so.6
#10 0x0808e308 in ?? ()
#11 0xb7a46560 in ?? () from /lib/tls/i686/cmov/libc.so.6
#12 0xffffffff in ?? ()
#13 0x00000000 in ?? ()