src/third_party/mozjs-45/js/src/jit-test/tests/basic/bug621022-1.js

function f(x) {
    delete arguments[0];
    undefined != arguments[0];
    undefined == arguments[0];
    undefined != arguments[0];
    undefined === arguments[0];
}

for(var i=0; i<20; i++) {
    f(1);
}

// Don't assert.