LayoutTests/imported/w3c/web-platform-tests/html/webappapis/scripting/processing-model-2/support/undefined-variable-in-setInterval.js

interval = setInterval('undefined_variable;', 10);
step_timeout(function(){
    clearInterval(interval);
    t.step(function(){
        assert_true(ran, 'ran');
        t.done();
    });
    t_col.step(col_check);
}, 20);