From b404990bb568a0ad222da1fb0187240f9eab8b51 Mon Sep 17 00:00:00 2001
From: Andrey Kleshchev <117672381+akleshchev@users.noreply.github.com>
Date: Thu, 12 Feb 2026 04:25:15 +0200
Subject: #5414 Don't crash on unknown layer type

We don't crash on an invalid size, so shouldn't crash on invalid data.
Not viewer's fault, try to keep going.
---
 indra/newview/llvlmanager.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/indra/newview/llvlmanager.cpp b/indra/newview/llvlmanager.cpp
index c2bcd32921..f4c2c27cee 100644
--- a/indra/newview/llvlmanager.cpp
+++ b/indra/newview/llvlmanager.cpp
@@ -68,7 +68,11 @@ void LLVLManager::addLayerData(LLVLData *vl_datap, const S32Bytes mesg_size)
     }
     else
     {
-        LL_ERRS() << "Unknown layer type!" << (S32)vl_datap->mType << LL_ENDL;
+        // Corrupted message? New feature?
+        LL_WARNS() << "Unknown layer type!" << (S32)vl_datap->mType
+            << " for region " << vl_datap->mRegionp->getName() << LL_ENDL;
+        delete vl_datap; // addLayerData took ownership
+        return;
     }
 
     mPacketData.push_back(vl_datap);
-- 
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