Description:
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Reporting this bug for a third party 
(http://www.reddit.com/r/PHP/comments/1hx7qz/what_is_going_on_here_how_do_i_fix_t
his_memory/), and related to a user note 
(http://www.php.net/manual/en/function.gmp-cmp.php#99120).

The gmp_cmp function leaks memory when a string is used as the value of the 
second parameter.

My guess is that it relates to the way that the type is juggled in the gmp_cmp 
function (https://github.com/php/php-src/blob/master/ext/gmp/gmp.c#L848), where 
it checks the type of the second parameter to see if it's a long. It doesn't 
however check if the second parameter is a string, or really any other type.



Test script:
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Third party's example code can be found at http://www.reddit.com/r/PHP/comments/1hx7qz/what_is_going_on_here_how_do_i_fix_this_memory/