Fix order of dynamic/readonly property checks

Author: kocsismate

ext/spl/spl_fixedarray.c

@@ -629,6 +629,9 @@ PHP_METHOD(SplFixedArray, __unserialize)
 	if (intern->array.size == 0) {
 		size = zend_hash_num_elements(data);
 		spl_fixedarray_init_non_empty_struct(&intern->array, size);
+		if (!size) {
+			return;
+		}
 		array_init(&members_zv);
 
 		intern->array.size = 0;

ext/standard/var_unserializer.re

@@ -641,6 +641,18 @@ declared_property:
 				int ret = is_property_visibility_changed(obj->ce, &key);
 
 				if (EXPECTED(!ret)) {
+					if (UNEXPECTED(obj->ce->ce_flags & ZEND_ACC_NO_DYNAMIC_PROPERTIES)) {
+						zend_throw_error(NULL, "Cannot create dynamic property %s::$%s",
+							ZSTR_VAL(obj->ce->name), zend_get_unmangled_property_name(Z_STR_P(&key)));
+						goto failure;
+					} else if (!(obj->ce->ce_flags & ZEND_ACC_ALLOW_DYNAMIC_PROPERTIES)) {
+						zend_error(E_DEPRECATED, "Creation of dynamic property %s::$%s is deprecated",
+							ZSTR_VAL(obj->ce->name), zend_get_unmangled_property_name(Z_STR_P(&key)));
+						if (EG(exception)) {
+							goto failure;
+						}
+					}
+
 					data = zend_hash_add_new(ht, Z_STR(key), &EG(uninitialized_zval));
 				} else if (ret < 0) {
 					goto failure;
@@ -654,18 +666,6 @@ second_try:
 						ZVAL_NULL(data);
 					}
 				}
-
-				if (UNEXPECTED(obj->ce->ce_flags & ZEND_ACC_NO_DYNAMIC_PROPERTIES)) {
-					zend_throw_error(NULL, "Cannot create dynamic property %s::$%s",
-						ZSTR_VAL(obj->ce->name), zend_get_unmangled_property_name(Z_STR_P(&key)));
-					goto failure;
-				} else if (!(obj->ce->ce_flags & ZEND_ACC_ALLOW_DYNAMIC_PROPERTIES)) {
-					zend_error(E_DEPRECATED, "Creation of dynamic property %s::$%s is deprecated",
-						ZSTR_VAL(obj->ce->name), zend_get_unmangled_property_name(Z_STR_P(&key)));
-					if (EG(exception)) {
-						goto failure;
-					}
-				}
 			}
 			zval_ptr_dtor_str(&key);
 		} else if (Z_TYPE(key) == IS_LONG) {