bt:
#0  0x006e4f64 in pri_fixup_principle (pri=0x715758, principle=-1, c=0xb7b10800)
    at chan_zap.c:7712
#1  0x00707a56 in pri_dchannel (vpri=0x715758) at chan_zap.c:8567
#2  0x0043e9a0 in pthread_start_thread ()
   from /lib/obsolete/linuxthreads/i686/libpthread.so.0
#3  0x001db99a in clone () from /lib/obsolete/linuxthreads/i686/libc.so.6