SET_INTERNAL_BIND 1629 src/data.c                                       (bindflag == SET_INTERNAL_BIND? Qlet :
SET_INTERNAL_BIND  622 src/eval.c                       Qnil, SET_INTERNAL_BIND);
SET_INTERNAL_BIND 3534 src/eval.c       do_specbind (sym, specpdl_ptr - 1, value, SET_INTERNAL_BIND);