ADD_TRACE         449 compile.c      	    ADD_TRACE(ret, nd_line(node), RUBY_EVENT_CLASS);
ADD_TRACE         451 compile.c      	    ADD_TRACE(ret, nd_line(node), RUBY_EVENT_END);
ADD_TRACE         455 compile.c      	    ADD_TRACE(ret, nd_line(node), RUBY_EVENT_CALL);
ADD_TRACE         457 compile.c      	    ADD_TRACE(ret, nd_line(node), RUBY_EVENT_RETURN);
ADD_TRACE        2908 compile.c      	ADD_TRACE(ret, nd_line(node), RUBY_EVENT_LINE);