Thread 1 (Thread -1211000144 (LWP 17182)):
#0  0xb7eed410 in __kernel_vsyscall ()
#1  0xb7d235c6 in pthread_cond_wait@@GLIBC_2.3.2 ()
   from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb7e26c3d in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0xb7e98ecf in u_read_i (ps=0x8054708, buf=0x0, len=1, flags=1, timeout=0)
    at libusb.c:542
#4  0xb7e989e4 in u_poll (ps=0x8054708, timeout=0) at libusb.c:456
#5  0xb7e96e07 in pi_usb_accept (ps=0x8054708, addr=0x0, addrlen=0x0)
    at usb.c:423
#6  0xb7ec1577 in pi_accept_to (pi_sd=3, addr=0x0, addrlen=0x0, timeout=0)
    at socket.c:1139
#7  0x0804fc7a in plu_connect () at userland.c:80
#8  0x0804f6ba in main (argc=4, argv=0xbfcbd544) at pilot-xfer.c:2511
#0  0xb7eed410 in __kernel_vsyscall ()