Fix HLSLParser: Always check preprocessor directive stack to be empty before using the top element

kblaschke · kblaschke · commit 76c8ff7e8a65 · 2026-05-07T15:13:50.000+02:00
diff --git 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;
 

Original file line number	Diff line number	Diff line change
`@@ -3614,7 +3614,7 @@ bool HLSLParser::ApplyPreprocessor(const char* fileName, const char* buffer, siz`
`3614`	`3614`	`isCodeActive.push(true);`
`3615`	`3615`	`m_tokenizer = HLSLTokenizer(fileName, buffer, length);`
`3616`	`3616`	`sourcePreprocessed.clear();`
`3617`		`- while (m_tokenizer.GetToken() != HLSLToken_EndOfStream)`
	`3617`	`+ while (m_tokenizer.GetToken() != HLSLToken_EndOfStream && !isCodeActive.empty())`
`3618`	`3618`	`{`
`3619`	`3619`	`bool addOriginalSource = true;`
`3620`	`3620`