rb_set_end_proc    46 eval_jump.c        rb_set_end_proc(rb_call_end_proc, proc);
rb_set_end_proc  11044 ext/tk/tcltklib.c     rb_set_end_proc(lib_mark_at_exit, 0);
rb_set_end_proc   440 include/ruby/intern.h void rb_set_end_proc(void (*)(VALUE), VALUE);
rb_set_end_proc  2522 vm.c               rb_set_end_proc(rb_call_end_proc, rb_block_proc());