[GIT-PULLS] [php-src] PR #23091: Fix GH-23089: stack overflow in array_merge_recursive() with deep arrays

[email protected] (lazerg)
Newsgroups php.git-pulls
Message-ID <7pI8dQGmR70NU4qacDEBvuIBadL3wQrx5pQLvaEOeFQ@main.internal.php.net> 
Pull Request: https://github.com/php/php-src/pull/23091
Author: lazerg

php_array_merge_recursive() recurses once per nesting level with no stack check, so array_merge_recursive() on a deeply nested array exhausts the native stack and the process dies with a segfault.

This adds the same stack limit check ext/standard already uses in var.c and http.c, so the call throws an Error instead of crashing.

Fixes #23089.
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