Description:
------------
Array_reduce seems to leak memory when an exception is thrown in callback and escapes outside array_reduce.


Configure line:
./configure'  '--disable-all


I also tested it with Docker's official php image, and it was the same result. (PHP version is 7.2.8)

docker run -it --rm --name my-running-script -v "$PWD":/usr/src/myapp -w /usr/src/myapp php:7.2-cli php array_reduce-throw.php

I guess this is caused by not doing zval_ptr_dtor(&result) in the else clause of line 5977 of ext/standard/array.c. 

PR #2931(https://github.com/php/php-src/pull/2931) also fixes this problem, But I did not intend it when I sent it.



Test script:
---------------
<?php

for ($i = 0; $i < 1000; $i++) {
    try {
        array_reduce(
            [1],
            function ($carry, $item) {
                throw new Exception;
            },
            range(1, 200000)
        );
    } catch (Exception $e) {
    }
}



Expected result:
----------------
The test script terminates normally.

Actual result:
--------------
Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 8388616 bytes) in /Users/matsui/array_reduce-throw.php on line 10