RUBY_MARK_LEAVE   107 cont.c             RUBY_MARK_LEAVE("cont");
RUBY_MARK_LEAVE   138 cont.c             RUBY_MARK_LEAVE("cont");
RUBY_MARK_LEAVE    93 iseq.c             RUBY_MARK_LEAVE("iseq");
RUBY_MARK_LEAVE    59 proc.c             RUBY_MARK_LEAVE("proc");
RUBY_MARK_LEAVE   243 proc.c             RUBY_MARK_LEAVE("binding");
RUBY_MARK_LEAVE   224 vm.c               RUBY_MARK_LEAVE("env");
RUBY_MARK_LEAVE  1445 vm.c               RUBY_MARK_LEAVE("vm");
RUBY_MARK_LEAVE  1603 vm.c               RUBY_MARK_LEAVE("thread");