Merge branch 'PHP-8.5'

* PHP-8.5:
  Fix incorrect RC-handling for ZEND_EXT_STMT op1

Author: iluuu1994

Zend/tests/gh21504.inc

@@ -0,0 +1,3 @@
+<?php
+
+'1234' |> var_dump(...);

Zend/tests/gh21504.phpt

@@ -0,0 +1,12 @@
+--TEST--
+GH-21504: Incorrect RC-handling for ZEND_EXT_STMT op1
+--FILE--
+<?php
+
+$php_escaped = getenv('TEST_PHP_EXECUTABLE_ESCAPED');
+$cmd = $php_escaped . ' -n -e ' . escapeshellarg(__DIR__ . '/gh21504.inc');
+echo shell_exec($cmd);
+
+?>
+--EXPECT--
+string(4) "1234"

Zend/zend_compile.c

@@ -1950,6 +1950,9 @@ static void zend_do_extended_stmt(znode* result) /* {{{ */
 
 	opline->opcode = ZEND_EXT_STMT;
 	if (result) {
+		if (result->op_type == IS_CONST) {
+			Z_TRY_ADDREF(result->u.constant);
+		}
 		SET_NODE(opline->op1, result);
 	}
 }