set_backtrace     516 eval.c         	    set_backtrace(mesg, at);
set_backtrace     718 eval.c         	    set_backtrace(mesg, argv[2]);
set_backtrace    1557 eval.c             set_backtrace(err, val);
set_backtrace      72 eval_error.c       ID set_backtrace = rb_intern("set_backtrace");
set_backtrace      75 eval_error.c   	if (rb_method_basic_definition_p(CLASS_OF(info), set_backtrace)) {