src/third_party/mozjs-45/js/src/jit-test/tests/ion/bug765477.js

function f(useArg2, arg2, expect) {
    var args = arguments;
    if (useArg2)
	args = arg2;
    assertEq(args.length, expect);
}
f(false, 0, 3);
f(false, 0, 3);