From 45eae36693251d6036c2f6e6d898137cb374575f Mon Sep 17 00:00:00 2001
From: Kai Blaschke <kai.blaschke@kb-dev.net>
Date: Fri, 24 Apr 2026 10:33:34 +0200
Subject: [PATCH] Fix HLSLParser: Always check preprocessor directive stack to
 be empty before using the top element

---
 vendor/hlslparser/src/HLSLParser.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/vendor/hlslparser/src/HLSLParser.cpp b/vendor/hlslparser/src/HLSLParser.cpp
index 6b798d5617..03ba4d92a6 100644
--- a/vendor/hlslparser/src/HLSLParser.cpp
+++ b/vendor/hlslparser/src/HLSLParser.cpp
@@ -3614,7 +3614,7 @@ bool HLSLParser::ApplyPreprocessor(const char* fileName, const char* buffer, siz
     isCodeActive.push(true);
     m_tokenizer = HLSLTokenizer(fileName, buffer, length);
     sourcePreprocessed.clear();
-    while (m_tokenizer.GetToken() != HLSLToken_EndOfStream)
+    while (m_tokenizer.GetToken() != HLSLToken_EndOfStream && !isCodeActive.empty())
     {
         bool addOriginalSource = true;