1 files changed, 15 insertions, 9 deletions

diff --git a/indra/newview/llmeshrepository.cpp b/indra/newview/llmeshrepository.cpp
index 0aaed3e286..27b26efa51 100644
--- a/indra/newview/llmeshrepository.cpp
+++ b/indra/newview/llmeshrepository.cpp
@@ -3906,8 +3906,8 @@ void LLMeshRepository::buildHull(const LLVolumeParams& params, S32 detail)
 
 bool LLMeshRepository::hasPhysicsShape(const LLUUID& mesh_id)
 {
-	LLSD mesh = mThread->getMeshHeader(mesh_id);
-	if (mesh.has("physics_mesh") && mesh["physics_mesh"].has("size") && (mesh["physics_mesh"]["size"].asInteger() > 0))
+	const LLSD* mesh = mThread->getMeshHeader(mesh_id);
+	if (mesh && mesh->has("physics_mesh") && (*mesh)["physics_mesh"].has("size") && ((*mesh)["physics_mesh"]["size"].asInteger() > 0))
 	{
 		return true;
 	}
@@ -3921,27 +3921,26 @@ bool LLMeshRepository::hasPhysicsShape(const LLUUID& mesh_id)
 	return false;
 }
 
-LLSD& LLMeshRepository::getMeshHeader(const LLUUID& mesh_id)
+const LLSD* LLMeshRepository::getMeshHeader(const LLUUID& mesh_id)
 {
 	LL_RECORD_BLOCK_TIME(FTM_MESH_FETCH);
 
 	return mThread->getMeshHeader(mesh_id);
 }
 
-LLSD& LLMeshRepoThread::getMeshHeader(const LLUUID& mesh_id)
+const LLSD* LLMeshRepoThread::getMeshHeader(const LLUUID& mesh_id)
 {
-	static LLSD dummy_ret;
 	if (mesh_id.notNull())
 	{
 		LLMutexLock lock(mHeaderMutex);
 		mesh_header_map::iterator iter = mMeshHeader.find(mesh_id);
-		if (iter != mMeshHeader.end())
+		if (iter != mMeshHeader.end() && mMeshHeaderSize[mesh_id] > 0)
 		{
-			return iter->second;
+			return &(iter->second);
 		}
 	}
 
-	return dummy_ret;
+	return NULL;
 }
 
 
@@ -4034,6 +4033,13 @@ void LLMeshRepository::uploadError(LLSD& args)
 //static
 F32 LLMeshRepository::getStreamingCost(LLSD& header, F32 radius, S32* bytes, S32* bytes_visible, S32 lod, F32 *unscaled_value)
 {
+	if (header.has("404")
+		|| !header.has("lowest_lod")
+		|| (header.has("version") && header["version"].asInteger() > MAX_MESH_VERSION))
+	{
+		return 0.f;
+	}
+
 	F32 max_distance = 512.f;
 
 	F32 dlowest = llmin(radius/0.03f, max_distance);
@@ -4093,7 +4099,7 @@ F32 LLMeshRepository::getStreamingCost(LLSD& header, F32 radius, S32* bytes, S32
 		}
 	}
 
-	F32 max_area = 102932.f; //area of circle that encompasses region
+	F32 max_area = 102944.f; //area of circle that encompasses region (see MAINT-6559)
 	F32 min_area = 1.f;
 
 	F32 high_area = llmin(F_PI*dmid*dmid, max_area);