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

function testIntUnderflow() {
    // int32_min + 8
    var ival = -2147483648 + 8;
    for (var i = 0; i < 30; i++) {
        ival -= 2;
    }
    return (ival > -2147483648);
}
assertEq(testIntUnderflow(), false);