From 0678b6bac2486dfd6d68082604464e66b04e2944 Mon Sep 17 00:00:00 2001
From: Pavel Shevaev <pacha.shevaev@gmail.com>
Date: Wed, 27 Mar 2024 12:51:20 +0300
Subject: [PATCH] Fixing thread safety possible issue when reading an array of
 enums and fixing related bug when the target enum array property wouldn't be
 cleared before reading data

---
 src/codegen.inc.php | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/codegen.inc.php b/src/codegen.inc.php
index 0002dc3..0e53152 100644
--- a/src/codegen.inc.php
+++ b/src/codegen.inc.php
@@ -450,9 +450,11 @@ function var_sync($fname, \mtgType $type, $buf, array $tokens, $opts)
     {
       if($type->getValue() instanceof \mtgMetaEnum)
       {
-        $str .= "MetaIO.tmp_enums_list.Clear(); if(!{$buf}.is_read) { foreach(var _enum_tmp in {$fname}) MetaIO.tmp_enums_list.Add((int)_enum_tmp); }\n";
-        $str .= "MetaIO.Sync({$buf}, MetaIO.tmp_enums_list, \"{$key_name}\", {$opts});\n";
-        $str .= "if({$buf}.is_read) foreach(var _int_tmp in MetaIO.tmp_enums_list) { {$fname}.Add(({$type->getValue()->getName()}) _int_tmp); }\n";
+        $str .= "{\n";
+        $str .= "var tmp_enums_list = new List<int>(); if(!{$buf}.is_read) { foreach(var _enum_tmp in {$fname}) tmp_enums_list.Add((int)_enum_tmp); }\n";
+        $str .= "MetaIO.Sync({$buf}, tmp_enums_list, \"{$key_name}\", {$opts});\n";
+        $str .= "if({$buf}.is_read) { {$fname}.Clear(); foreach(var _int_tmp in MetaIO.tmp_enums_list) {$fname}.Add(({$type->getValue()->getName()}) _int_tmp); }\n";
+        $str .= "}\n";
       }
       else
         $str .= "MetaIO.Sync({$buf}, {$fname}, \"{$key_name}\", {$opts});\n";