excl_start        466 gc/mark_rts.c      ptr_t excl_start;
excl_start        470 gc/mark_rts.c  	if (0 == next || (excl_start = next -> e_start) >= top) {
excl_start        474 gc/mark_rts.c  	if (excl_start > bottom) GC_push_conditional(bottom, excl_start, all);