cv@cnc:~/7seg/comp$ gdb /usr/bin/hal_mydro core GNU gdb (GDB) 7.1-ubuntu Copyright (C) 2010 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "i486-linux-gnu". For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>... Reading symbols from /usr/bin/hal_mydro...done. [New Thread 2573] warning: Can't read pathname for load map: Input/output error. Reading symbols from /usr/lib/libemchal.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libemchal.so.0 Reading symbols from /lib/tls/i686/cmov/libc.so.6...(no debugging symbols found)...done. Loaded symbols for /lib/tls/i686/cmov/libc.so.6 Reading symbols from /lib/tls/i686/cmov/libm.so.6...(no debugging symbols found)...done. Loaded symbols for /lib/tls/i686/cmov/libm.so.6 Reading symbols from /usr/lib/libstdc++.so.6...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libstdc++.so.6 Reading symbols from /lib/libgcc_s.so.1...(no debugging symbols found)...done. Loaded symbols for /lib/libgcc_s.so.1 Reading symbols from /lib/ld-linux.so.2...(no debugging symbols found)...done. Loaded symbols for /lib/ld-linux.so.2 Core was generated by `hal_mydro'. Program terminated with signal 11, Segmentation fault. #0 user_mainloop (argc_=1, argv_=0xbff736b4) at hal_mydro.comp:135 135 x_val = (double)xpos; (gdb) q