A Death Wyvern sometimes makes the game crash or even freeze. The latter is observed in map04, in other maps the game crashes with following output:

Log: Sys_Error: overflow
Log: - VRenderLevel::AllocBlock
Log: - VRenderLevel::CacheSurface
Log: - VRenderLevel::QueueWorldSurface
Log: - VRenderLevelShared::RenderBspWorld::World surfaces
Log: - VRenderLevelShared::RenderBspWorld
Log: - VRenderLevel::RenderWorld
Log: - VRenderLevel::RenderScene
Log: - VRenderLevelShared::RenderPlayerView
Log: - R_RenderPlayerView
Log: - SCR_Update
Log: - Host_Frame
Log: Doing C_Shutdown
Log: Doing CL_Shutdown
Log: tanthalos left the game

Log: Doing SV_Shutdown
Log: Doing delete GNet
Log: Doing delete GInput
Log: Doing V_Shutdown
Log: Doing delete GAudio
Log: Doing T_Shutdown
Log: Doing Sys_Shutdown
Log: Doing delete GSoundManager
Log: Doing R_ShutdownTexture
Log: Doing R_ShutdownData
Log: Doing VCommand::Shutdown
Log: Doing VCvar::Shutdown
Log: Doing ShutdownMapInfo
Log: Doing FL_Shutdown
Log: Doing W_Shutdown
Log: Doing GLanguage.FreeData
Log: Doing ShutdownDecorate
Log: Doing VObject::StaticExit
Log: Doing VName::StaticExit
Uninitialised: Doing Z_Shutdown


ERROR: overflow