This is a somewhat old version of gdb, so if this is fixed already, I apologize: # gdb /t/menu/menu GNU gdb 4.18 Copyright 1998 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "i386-unknown-freebsd"... (gdb) attach 2289 Attaching to program: /t/menu/menu, process 2289 Reading symbols from /t/video/libolib.so...done. Reading symbols from /usr/lib/libg++.so.4...done. Reading symbols from /usr/lib/libstdc++.so.2...done. Reading symbols from /usr/lib/libm.so.2...done. Reading symbols from /usr/lib/libc.so.3...done. Reading symbols from /usr/libexec/ld-elf.so.1...done. 0x2818efd8 in open () from /usr/lib/libc.so.3 (gdb) bt #0 0x2818efd8 in open () from /usr/lib/libc.so.3 #1 0x281ae2b1 in fopen () from /usr/lib/libc.so.3 #2 0x805b87f in main (argc=1, argv=0xbfbfdcbc) at menu.cpp:253 (gdb) down Bottom (i.e., innermost) frame selected; you cannot go down. (gdb) up #1 0x281ae2b1 in fopen () from /usr/lib/libc.so.3 (gdb) up #2 0x805b87f in main (argc=1, argv=0xbfbfdcbc) at menu.cpp:253 253 FILE *test_snd=fopen("/tmp/sound/fifo.0","r"); (gdb) list 248 } 249 } 250 fclose(test_io); 251 252 // wait to run menu until we are sure that /tmp/sound/fifo.0 253 FILE *test_snd=fopen("/tmp/sound/fifo.0","r"); 254 while(!test_snd) 255 { 256 static int try_count=0; 257 printf("/tmp/sound/fifo.0 not found, waiting 1 sec.\n"); (gdb) cont Continuing. ^C Program received signal SIGINT, Interrupt. 0x2818efd8 in open () from /usr/lib/libc.so.3 (gdb) quit The program is running. Quit anyway (and detach it)? (y or n) y Detaching from program: /t/menu/menu, process 2289 gdb in free(): warning: chunk is already free. # Notice the malloc warning after I quit. If this is a FreeBSD specific bug somehow, I'll notify them instead. If you need any other information, please let me know. Kevin