From c0bd024094c0d0f4eec1a0556fce91b31352cc50 Mon Sep 17 00:00:00 2001
From: Christoph Oelckers <coelckers@users.noreply.github.com>
Date: Sat, 19 Oct 2024 13:11:48 +0200
Subject: [PATCH] do not open resource files from non-open file readers.

---
 src/common/filesystem/source/resourcefile.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/common/filesystem/source/resourcefile.cpp b/src/common/filesystem/source/resourcefile.cpp
index 81e2b78508..00a5234ca1 100644
--- a/src/common/filesystem/source/resourcefile.cpp
+++ b/src/common/filesystem/source/resourcefile.cpp
@@ -162,6 +162,7 @@ static int nulPrintf(FSMessageLevel msg, const char* fmt, ...)
 
 FResourceFile *FResourceFile::DoOpenResourceFile(const char *filename, FileReader &file, bool containeronly, LumpFilterInfo* filter, FileSystemMessageFunc Printf, StringPool* sp)
 {
+	if (!file.isOpen()) return nullptr;
 	if (Printf == nullptr) Printf = nulPrintf;
 	for(auto func : funcs)
 	{