(gdb) f 0
#0  0xb7d8b3ba in _etk_vbox_size_request (widget=0x833f5e8, size=0xbfdc53a4)
    at etk_box.c:800
800              box->request_sizes[i][j] = 0;
(gdb) p box->request_sizes
$1 = {0x0, 0x0}
(gdb) p i
$2 = 0
(gdb) p j
$3 = <value optimized out>