Language: PHP
Label: vulnerable
CWE: CWE-835 \u2014 Loop with Unreachable Exit Condition ('Infinite Loop')
The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.

Code:
    public function __construct(BigInteger $modulo)
    {
        //if (!$modulo->isPrime()) {
        //    throw new \UnexpectedValueException('PrimeField requires a prime number be passed to the constructor');
        //}

        $this->instanceID = self::$instanceCounter++;
        Integer::setModulo($this->instanceID, $modulo);
        Integer::setRecurringModuloFunction($this->instanceID, $modulo->createRecurringModuloFunction());
    }