[php-src] Issue #8079: Recent patch to SplFixedArray causes array_walk + json encode to hang

Issue: https://github.com/php/php-src/issues/8079 Comment Author: TysonAndre > This didn't work in PHP-8.0 before the patch, because of assertion - Zend/zend_hash.c:987: > _zend_hash_index_add_or_update_i: Assertion `(zend_gc_refcount(&(ht)->gc) == 1) || > ((ht)->u.flags & (1<<6))' failed That was usually setting the value of the array field to itself, unless you're trying really hard to deliberately do that, so the debug assertion error seemed less severe than infinite recursion. I wonder if there were optimizations to avoid building properties in some cases, e.g. when there were no dynamic properties of VarDumper? I thought I saw some but am likely mistaken