Given the snippet

<?php

/**
 * @psalm-template TKey of object
 * @psalm-template TValue
 * @template-extends SplObjectStorage<TKey, TValue>
 */
class ObjectStorage extends SplObjectStorage
{
}

$foo = new ObjectStorage();

Psalm endlessly ponders its last line, until it hits the memory_limit. The demo snippet https://psalm.dev/r/95d73fc1a4 has no output, because the worker supposedly crashes, too.

Current versions (tested with 4.4+) choke on it, but Psalm 3.18.2 does not.