(gdb) bt full
#0  0xb6f2f8be in loopback_VertexAttrib4dvNV (index=145899181, v=0x1efa13ec)
    at main/api_loopback.c:1156
No locals.
#1  0xb6f2f93a in loopback_VertexAttribs4dvNV (index=739, n=145899180, v=0x8b23e8c)
    at main/api_loopback.c:1260
        i = 145899179
#2  0xb6e55bb7 in execute_list (ctx=0x8ade770, list=<value optimized out>)
    at main/dlist.c:8161
        opcode = <value optimized out>
        dlist = <value optimized out>
        n = 0x8b23ea4
        done = <value optimized out>
#3  0xb6e593c6 in _mesa_CallList (list=1) at main/dlist.c:8511
        save_compile_flag = 12 '\f'
        __FUNCTION__ = "_mesa_CallList"
#4  0x0804952e in ?? ()
No symbol table info available.
#5  0x0804aa32 in ?? ()
No symbol table info available.
#6  0xb73bec76 in __libc_start_main (main=0x804a560, argc=1, ubp_av=0xbfc25db4, 
    init=0x804afa0, fini=0x804af90, rtld_fini=0xb7797040 <_dl_fini>, 
    stack_end=0xbfc25dac) at libc-start.c:228
        result = <value optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {-1219584012, 0, 0, -1077781112, 
                -438146495, 377502800}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 
              0x1, 0x8049260}, data = {prev = 0x0, cleanup = 0x0, canceltype = 1}}}
        not_first_call = <value optimized out>
#7  0x08049281 in ?? ()
No symbol table info available.