Description:
------------
Using an error handler, throwing and catching the ErrorException leaks memory.

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

$last = time();
ini_set('memory_limit', '8G');

set_error_handler(function ($severity, $message, $file, $line) {
	throw new \ErrorException($message, 0, $severity, $file, $line);
});

while(true)
{
	try {
		trigger_error("Something");
	} catch(\Throwable $e) {
		
	}
	
	if(time() - $last >= 1) {
		$last = time();
		printf("\nMemory: %.4f", memory_get_usage() / (1024 * 1024));
	}

        gc_collect_cycles(); // doesn't help much
}

Expected result:
----------------
Nearly constant memory usage

Actual result:
--------------
Memory: 3.7187
Memory: 5.0504
Memory: 6.0593
Memory: 6.9050
Memory: 7.6437
Memory: 8.3095
Memory: 8.9218
Memory: 9.4904
...
Memory: 97.7963
Memory: 219.5202
Memory: 300.1706
Segmentation fault (core dumped)