translation/Parser: reject duplicate CACHE_TAGs

MaxKellermann · MaxKellermann · commit d5a34a0c0848 · 2026-01-30T15:39:15.000+01:00
diff --git a/src/translation/Parser.cxx b/src/translation/Parser.cxx
@@ -3841,6 +3841,9 @@ TranslateParser::HandleRegularPacket(TranslationCommand command,
 			return;
 		}
 
+		if (response.cache_tags.Contains(string_payload.data()))
+			throw std::runtime_error{"duplicate CACHE_TAG packet"};
+
 		response.cache_tags.Add(alloc, string_payload.data());
 #else
 		// ignore

Original file line number	Diff line number	Diff line change
`@@ -3841,6 +3841,9 @@ TranslateParser::HandleRegularPacket(TranslationCommand command,`
`3841`	`3841`	`return;`
`3842`	`3842`	`}`
`3843`	`3843`
	`3844`	`+ if (response.cache_tags.Contains(string_payload.data()))`
	`3845`	`+ throw std::runtime_error{"duplicate CACHE_TAG packet"};`
	`3846`	`+`
`3844`	`3847`	`response.cache_tags.Add(alloc, string_payload.data());`
`3845`	`3848`	`#else`
`3846`	`3849`	`// ignore`