Merge branch 'PHP-8.4'

* PHP-8.4:
  Fix GH-19397: mb_list_encodings() can cause crashes on shutdown

Author: nielsdos

ext/mbstring/mbstring.c

@@ -1160,8 +1160,8 @@ PHP_RSHUTDOWN_FUNCTION(mbstring)
 	MBSTRG(outconv_state) = 0;
 
 	if (MBSTRG(all_encodings_list)) {
-		GC_DELREF(MBSTRG(all_encodings_list));
-		zend_array_destroy(MBSTRG(all_encodings_list));
+		/* must be *array* release to remove from GC root buffer and free the hashtable itself */
+		zend_array_release(MBSTRG(all_encodings_list));
 		MBSTRG(all_encodings_list) = NULL;
 	}
 

ext/mbstring/tests/gh19397.phpt

@@ -0,0 +1,11 @@
+--TEST--
+GH-19397 (mb_list_encodings() can cause crashes on shutdown)
+--EXTENSIONS--
+mbstring
+--FILE--
+<?php
+$doNotDeleteThisVariableAssignment = mb_list_encodings();
+var_dump(count($doNotDeleteThisVariableAssignment) > 0);
+?>
+--EXPECT--
+bool(true)