BUG in Input.php

It's not a bug you're passing invalid input. Why are you using a float?

Code:

    /**
     * Set cookie
     *
     * Accepts an arbitrary number of parameters (up to 7) or an associative
     * array in the first parameter containing all the values.
     *
     * @param    string|mixed[]    $name        Cookie name or an array containing parameters
     * @param    string        $value        Cookie value
     * @param    int        $expire        Cookie expiration time in seconds