Fix iteration of data class by-ref

Author: iluuu1994

Zend/tests/data_classes/iter.phpt

@@ -0,0 +1,33 @@
+--TEST--
+Iteration of data classes
+--FILE--
+<?php
+
+#[AllowDynamicProperties]
+data class Box {
+    public $value;
+}
+
+$box = new Box();
+$box->value = 1;
+$copy = $box;
+
+foreach ($box as $value) {
+    var_dump($value);
+}
+
+foreach ($box as $prop => &$value) {
+    if ($box->value === 1) {
+        $box->dynamic = 1;
+    }
+    $value++;
+    var_dump($prop, $value);
+}
+
+?>
+--EXPECT--
+int(1)
+string(5) "value"
+int(2)
+string(7) "dynamic"
+int(2)

Zend/zend_vm_def.h

@@ -6884,6 +6884,9 @@ ZEND_VM_COLD_CONST_HANDLER(125, ZEND_FE_RESET_RW, CONST|TMP|VAR|CV, JMP_ADDR)
 		ZEND_VM_NEXT_OPCODE();
 	} else if (OP1_TYPE != IS_CONST && EXPECTED(Z_TYPE_P(array_ptr) == IS_OBJECT)) {
 		if (!Z_OBJCE_P(array_ptr)->get_iterator) {
+			if (OP1_TYPE & (IS_CV|IS_VAR)) {
+				SEPARATE_DATA_OBJ(array_ptr);
+			}
 			HashTable *properties;
 			if (OP1_TYPE == IS_VAR || OP1_TYPE == IS_CV) {
 				if (array_ptr == array_ref) {