UnrealLightmass on macOS keeps crashing

It looks like UnrealLightmass keeps crashing every time it is invoked from the editor while rebuilding lighting.

Here is a log:

➜  Mac ./UnrealLightmass
2025-06-13 11:05:37.574 UnrealLightmass[13193:26636640] [UE] Failed to find game directory: /Users/Shared/EpicGames/UE_5.6/UnrealLightmass/Binaries
Stats thread started at 0.071563
ICU TimeZone Detection - Raw Offset: +1:00, Platform Override: ''
Session CrashGUID >====================================================
         Session CrashGUID >   UECC-Mac-2FB8E3BFAA4AB5A0F1365382706614DB
         Session CrashGUID >====================================================
No local boot hotfix file found at: [../../../Engine/Programs/UnrealLightmass/Saved/PersistentDownloadDir/HotfixForNextBoot.txt]
2025-06-13 11:05:37.754 UnrealLightmass[13193:26636640] [UE] LogConfig: No local boot hotfix file found at: [../../../Engine/Programs/UnrealLightmass/Saved/PersistentDownloadDir/HotfixForNextBoot.txt]
Mounting Engine plugin UdpMessaging
2025-06-13 11:05:37.754 UnrealLightmass[13193:26636640] [UE] LogPluginManager: Mounting Engine plugin UdpMessaging
ExecutableName: UnrealLightmass
2025-06-13 11:05:37.755 UnrealLightmass[13193:26636640] [UE] LogInit: ExecutableName: UnrealLightmass
Build: ++UE5+Release-5.6-CL-43139311
2025-06-13 11:05:37.755 UnrealLightmass[13193:26636640] [UE] LogInit: Build: ++UE5+Release-5.6-CL-43139311
Platform=MacEditor
2025-06-13 11:05:37.755 UnrealLightmass[13193:26636640] [UE] LogInit: Platform=MacEditor
MachineId=2368607e964f5fe73530eea8f82cb205
2025-06-13 11:05:37.755 UnrealLightmass[13193:26636640] [UE] LogInit: MachineId=2368607e964f5fe73530eea8f82cb205
DeviceId=
2025-06-13 11:05:37.755 UnrealLightmass[13193:26636640] [UE] LogInit: DeviceId=
Engine Version: 5.6.0-43139311+++UE5+Release-5.6
2025-06-13 11:05:37.755 UnrealLightmass[13193:26636640] [UE] LogInit: Engine Version: 5.6.0-43139311+++UE5+Release-5.6
Compatible Engine Version: 5.6.0-43139311+++UE5+Release-5.6
2025-06-13 11:05:37.755 UnrealLightmass[13193:26636640] [UE] LogInit: Compatible Engine Version: 5.6.0-43139311+++UE5+Release-5.6
Net CL: 43139311
2025-06-13 11:05:37.755 UnrealLightmass[13193:26636640] [UE] LogInit: Net CL: 43139311
OS: macOS 15.5 (24F74), CPU: Apple M4 Max, GPU: Apple M4 Max
2025-06-13 11:05:37.755 UnrealLightmass[13193:26636640] [UE] LogInit: OS: macOS 15.5 (24F74), CPU: Apple M4 Max, GPU: Apple M4 Max
Compiled (64-bit): May 31 2025 12:36:45
2025-06-13 11:05:37.755 UnrealLightmass[13193:26636640] [UE] LogInit: Compiled (64-bit): May 31 2025 12:36:45
Architecture: x64
2025-06-13 11:05:37.755 UnrealLightmass[13193:26636640] [UE] LogInit: Architecture: x64
Compiled with Clang: 16.0.0 (clang-1600.0.26.4)
2025-06-13 11:05:37.755 UnrealLightmass[13193:26636640] [UE] LogInit: Compiled with Clang: 16.0.0 (clang-1600.0.26.4)
Build Configuration: Development
2025-06-13 11:05:37.755 UnrealLightmass[13193:26636640] [UE] LogInit: Build Configuration: Development
Branch Name: ++UE5+Release-5.6
2025-06-13 11:05:37.755 UnrealLightmass[13193:26636640] [UE] LogInit: Branch Name: ++UE5+Release-5.6
Command Line:  -Messaging -nostdout
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogInit: Command Line:  -Messaging -nostdout
Base Directory: /Users/Shared/EpicGames/UE_5.6/Engine/Binaries/Mac/
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogInit: Base Directory: /Users/Shared/EpicGames/UE_5.6/Engine/Binaries/Mac/
Allocator: ANSI
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogInit: Allocator: ANSI
Installed Engine Build: 1
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogInit: Installed Engine Build: 1
This binary is optimized with LTO: no, PGO: no, instrumented for PGO data collection: no
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogInit: This binary is optimized with LTO: no, PGO: no, instrumented for PGO data collection: no
Number of dev versions registered: 35
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogDevObjectVersion: Number of dev versions registered: 35
  Dev-Blueprints (B0D832E4-1F89-4F0D-ACCF-7EB736FD4AA2): 10
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogDevObjectVersion:   Dev-Blueprints (B0D832E4-1F89-4F0D-ACCF-7EB736FD4AA2): 10
  Dev-Build (E1C64328-A22C-4D53-A36C-8E866417BD8C): 0
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogDevObjectVersion:   Dev-Build (E1C64328-A22C-4D53-A36C-8E866417BD8C): 0
  Dev-Core (375EC13C-06E4-48FB-B500-84F0262A717E): 4
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogDevObjectVersion:   Dev-Core (375EC13C-06E4-48FB-B500-84F0262A717E): 4
  Dev-Editor (E4B068ED-F494-42E9-A231-DA0B2E46BB41): 40
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogDevObjectVersion:   Dev-Editor (E4B068ED-F494-42E9-A231-DA0B2E46BB41): 40
  Dev-Framework (CFFC743F-43B0-4480-9391-14DF171D2073): 37
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogDevObjectVersion:   Dev-Framework (CFFC743F-43B0-4480-9391-14DF171D2073): 37
  Dev-Mobile (B02B49B5-BB20-44E9-A304-32B752E40360): 3
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogDevObjectVersion:   Dev-Mobile (B02B49B5-BB20-44E9-A304-32B752E40360): 3
  Dev-Networking (A4E4105C-59A1-49B5-A7C5-40C4547EDFEE): 0
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogDevObjectVersion:   Dev-Networking (A4E4105C-59A1-49B5-A7C5-40C4547EDFEE): 0
  Dev-Online (39C831C9-5AE6-47DC-9A44-9C173E1C8E7C): 0
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogDevObjectVersion:   Dev-Online (39C831C9-5AE6-47DC-9A44-9C173E1C8E7C): 0
  Dev-Physics (78F01B33-EBEA-4F98-B9B4-84EACCB95AA2): 20
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogDevObjectVersion:   Dev-Physics (78F01B33-EBEA-4F98-B9B4-84EACCB95AA2): 20
  Dev-Platform (6631380F-2D4D-43E0-8009-CF276956A95A): 0
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogDevObjectVersion:   Dev-Platform (6631380F-2D4D-43E0-8009-CF276956A95A): 0
  Dev-Rendering (12F88B9F-8875-4AFC-A67C-D90C383ABD29): 49
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogDevObjectVersion:   Dev-Rendering (12F88B9F-8875-4AFC-A67C-D90C383ABD29): 49
  Dev-Sequencer (7B5AE74C-D270-4C10-A958-57980B212A5A): 13
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogDevObjectVersion:   Dev-Sequencer (7B5AE74C-D270-4C10-A958-57980B212A5A): 13
  Dev-VR (D7296918-1DD6-4BDD-9DE2-64A83CC13884): 3
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogDevObjectVersion:   Dev-VR (D7296918-1DD6-4BDD-9DE2-64A83CC13884): 3
  Dev-LoadTimes (C2A15278-BFE7-4AFE-6C17-90FF531DF755): 1
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogDevObjectVersion:   Dev-LoadTimes (C2A15278-BFE7-4AFE-6C17-90FF531DF755): 1
  Private-Geometry (6EACA3D4-40EC-4CC1-B786-8BED09428FC5): 3
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogDevObjectVersion:   Private-Geometry (6EACA3D4-40EC-4CC1-B786-8BED09428FC5): 3
  Dev-AnimPhys (29E575DD-E0A3-4627-9D10-D276232CDCEA): 17
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogDevObjectVersion:   Dev-AnimPhys (29E575DD-E0A3-4627-9D10-D276232CDCEA): 17
  Dev-Anim (AF43A65D-7FD3-4947-9873-3E8ED9C1BB05): 15
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogDevObjectVersion:   Dev-Anim (AF43A65D-7FD3-4947-9873-3E8ED9C1BB05): 15
  Dev-ReflectionCapture (6B266CEC-1EC7-4B8F-A30B-E4D90942FC07): 1
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogDevObjectVersion:   Dev-ReflectionCapture (6B266CEC-1EC7-4B8F-A30B-E4D90942FC07): 1
  Dev-Automation (0DF73D61-A23F-47EA-B727-89E90C41499A): 1
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogDevObjectVersion:   Dev-Automation (0DF73D61-A23F-47EA-B727-89E90C41499A): 1
  FortniteMain (601D1886-AC64-4F84-AA16-D3DE0DEAC7D6): 207
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogDevObjectVersion:   FortniteMain (601D1886-AC64-4F84-AA16-D3DE0DEAC7D6): 207
  FortniteValkyrie (8DBC2C5B-54A7-43E0-A768-FCBB7DA29060): 8
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogDevObjectVersion:   FortniteValkyrie (8DBC2C5B-54A7-43E0-A768-FCBB7DA29060): 8
  FortniteSeason (5B4C06B7-2463-4AF8-805B-BF70CDF5D0DD): 13
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogDevObjectVersion:   FortniteSeason (5B4C06B7-2463-4AF8-805B-BF70CDF5D0DD): 13
  FortniteRelease (E7086368-6B23-4C58-8439-1B7016265E91): 17
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogDevObjectVersion:   FortniteRelease (E7086368-6B23-4C58-8439-1B7016265E91): 17
  Dev-Enterprise (9DFFBCD6-494F-0158-E221-12823C92A888): 11
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogDevObjectVersion:   Dev-Enterprise (9DFFBCD6-494F-0158-E221-12823C92A888): 11
  Dev-Niagara (F2AED0AC-9AFE-416F-8664-AA7FFA26D6FC): 1
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogDevObjectVersion:   Dev-Niagara (F2AED0AC-9AFE-416F-8664-AA7FFA26D6FC): 1
  Dev-Destruction (174F1F0B-B4C6-45A5-B13F-2EE8D0FB917D): 10
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogDevObjectVersion:   Dev-Destruction (174F1F0B-B4C6-45A5-B13F-2EE8D0FB917D): 10
  Dev-Physics-Ext (35F94A83-E258-406C-A318-09F59610247C): 41
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogDevObjectVersion:   Dev-Physics-Ext (35F94A83-E258-406C-A318-09F59610247C): 41
  Dev-PhysicsMaterial-Chaos (B68FC16E-8B1B-42E2-B453-215C058844FE): 1
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogDevObjectVersion:   Dev-PhysicsMaterial-Chaos (B68FC16E-8B1B-42E2-B453-215C058844FE): 1
  Dev-CineCamera (B2E18506-4273-CFC2-A54E-F4BB758BBA07): 1
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogDevObjectVersion:   Dev-CineCamera (B2E18506-4273-CFC2-A54E-F4BB758BBA07): 1
  Dev-VirtualProduction (64F58936-FD1B-42BA-BA96-7289D5D0FA4E): 1
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogDevObjectVersion:   Dev-VirtualProduction (64F58936-FD1B-42BA-BA96-7289D5D0FA4E): 1
  UE5-Main (697DD581-E64F-41AB-AA4A-51ECBEB7B628): 121
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogDevObjectVersion:   UE5-Main (697DD581-E64F-41AB-AA4A-51ECBEB7B628): 121
  UE5-Release (D89B5E42-24BD-4D46-8412-ACA8DF641779): 56
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogDevObjectVersion:   UE5-Release (D89B5E42-24BD-4D46-8412-ACA8DF641779): 56
  UE5-SpecialProject (59DA5D52-1232-4948-B878-597870B8E98B): 9
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogDevObjectVersion:   UE5-SpecialProject (59DA5D52-1232-4948-B878-597870B8E98B): 9
  Dev-MediaFramework (6F0ED827-A609-4895-9C91-998D90180EA4): 2
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogDevObjectVersion:   Dev-MediaFramework (6F0ED827-A609-4895-9C91-998D90180EA4): 2
  Dev-NaniteResearch (30D58BE3-95EA-4282-A6E3-B159D8EBB06A): 1
2025-06-13 11:05:37.756 UnrealLightmass[13193:26636640] [UE] LogDevObjectVersion:   Dev-NaniteResearch (30D58BE3-95EA-4282-A6E3-B159D8EBB06A): 1
Presizing for max 100000 objects, including 0 objects not considered by GC.
2025-06-13 11:05:37.764 UnrealLightmass[13193:26636640] [UE] LogInit: Presizing for max 100000 objects, including 0 objects not considered by GC.
Object subsystem initialized
2025-06-13 11:05:37.771 UnrealLightmass[13193:26636640] [UE] LogInit: Object subsystem initialized
Applying CVar settings from Section [Startup] File [../../../Engine/Config/ConsoleVariables.ini]
2025-06-13 11:05:37.773 UnrealLightmass[13193:26636726] [UE] LogConfig: Applying CVar settings from Section [Startup] File [../../../Engine/Config/ConsoleVariables.ini]
CVar [[r.DumpShaderDebugInfo:2]] deferred - dummy variable created
2025-06-13 11:05:37.773 UnrealLightmass[13193:26636726] [UE] LogConfig: CVar [[r.DumpShaderDebugInfo:2]] deferred - dummy variable created
CVar [[p.chaos.AllowCreatePhysxBodies:1]] deferred - dummy variable created
2025-06-13 11:05:37.773 UnrealLightmass[13193:26636726] [UE] [2025.06.13-09.05.37:773][  0]LogConfig: CVar [[p.chaos.AllowCreatePhysxBodies:1]] deferred - dummy variable created
CVar [[fx.SkipVectorVMBackendOptimizations:1]] deferred - dummy variable created
2025-06-13 11:05:37.773 UnrealLightmass[13193:26636726] [UE] [2025.06.13-09.05.37:773][  0]LogConfig: CVar [[fx.SkipVectorVMBackendOptimizations:1]] deferred - dummy variable created
CVar [[ds.CADTranslator.Meshing.ActivateThinZoneMeshing:0]] deferred - dummy variable created
2025-06-13 11:05:37.773 UnrealLightmass[13193:26636726] [UE] [2025.06.13-09.05.37:773][  0]LogConfig: CVar [[ds.CADTranslator.Meshing.ActivateThinZoneMeshing:0]] deferred - dummy variable created
CVar [[ds.CADTranslator.Stitching.RemoveThinFaces:0]] deferred - dummy variable created
2025-06-13 11:05:37.773 UnrealLightmass[13193:26636726] [UE] [2025.06.13-09.05.37:773][  0]LogConfig: CVar [[ds.CADTranslator.Stitching.RemoveThinFaces:0]] deferred - dummy variable created
Applying CVar settings from Section [Startup_Mac] File [../../../Engine/Config/ConsoleVariables.ini]
2025-06-13 11:05:37.774 UnrealLightmass[13193:26636726] [UE] [2025.06.13-09.05.37:774][  0]LogConfig: Applying CVar settings from Section [Startup_Mac] File [../../../Engine/Config/ConsoleVariables.ini]
Applying CVar settings from Section [ConsoleVariables] File [Engine]
2025-06-13 11:05:37.774 UnrealLightmass[13193:26636726] [UE] [2025.06.13-09.05.37:774][  0]LogConfig: Applying CVar settings from Section [ConsoleVariables] File [Engine]
CVar [[r.HairStrands.Visibility.MSAA.SamplePerPixel:1]] deferred - dummy variable created
2025-06-13 11:05:37.774 UnrealLightmass[13193:26636726] [UE] [2025.06.13-09.05.37:774][  0]LogConfig: CVar [[r.HairStrands.Visibility.MSAA.SamplePerPixel:1]] deferred - dummy variable created
CVar [[r.SceneCulling.ExplicitCellBounds:1]] deferred - dummy variable created
2025-06-13 11:05:37.774 UnrealLightmass[13193:26636726] [UE] [2025.06.13-09.05.37:774][  0]LogConfig: CVar [[r.SceneCulling.ExplicitCellBounds:1]] deferred - dummy variable created
CVar [[r.GPUStatsEnabled:0]] deferred - dummy variable created
2025-06-13 11:05:37.774 UnrealLightmass[13193:26636726] [UE] [2025.06.13-09.05.37:774][  0]LogConfig: CVar [[r.GPUStatsEnabled:0]] deferred - dummy variable created
macOS 15.5 (24F74)
2025-06-13 11:05:37.774 UnrealLightmass[13193:26636726] [UE] [2025.06.13-09.05.37:774][  0]LogInit: macOS 15.5 (24F74)
Model: Mac16,6
2025-06-13 11:05:37.774 UnrealLightmass[13193:26636726] [UE] [2025.06.13-09.05.37:774][  0]LogInit: Model: Mac16,6
CPU: Apple M4 Max
2025-06-13 11:05:37.774 UnrealLightmass[13193:26636726] [UE] [2025.06.13-09.05.37:774][  0]LogInit: CPU: Apple M4 Max
CPU Page size=4096, Cores=16, HT=16
2025-06-13 11:05:37.774 UnrealLightmass[13193:26636726] [UE] [2025.06.13-09.05.37:774][  0]LogInit: CPU Page size=4096, Cores=16, HT=16
Computer: Host-001.homenet.telecomitalia.it
2025-06-13 11:05:37.774 UnrealLightmass[13193:26636726] [UE] [2025.06.13-09.05.37:774][  0]LogInit: Computer: Host-001.homenet.telecomitalia.it
User: tanis
2025-06-13 11:05:37.774 UnrealLightmass[13193:26636726] [UE] [2025.06.13-09.05.37:774][  0]LogInit: User: tanis
High frequency timer resolution =1000.000000 MHz
2025-06-13 11:05:37.774 UnrealLightmass[13193:26636726] [UE] [2025.06.13-09.05.37:774][  0]LogInit: High frequency timer resolution =1000.000000 MHz
Power Source: Battery Power
2025-06-13 11:05:37.774 UnrealLightmass[13193:26636726] [UE] [2025.06.13-09.05.37:774][  0]LogInit: Power Source: Battery Power
Memory total: Physical=64.0GB (64GB approx) Pagefile=18.0GB Virtual=82.0GB
2025-06-13 11:05:37.774 UnrealLightmass[13193:26636726] [UE] [2025.06.13-09.05.37:774][  0]LogInit: Memory total: Physical=64.0GB (64GB approx) Pagefile=18.0GB Virtual=82.0GB
408 objects as part of root set at end of initial load.
2025-06-13 11:05:37.788 UnrealLightmass[13193:26636726] [UE] [2025.06.13-09.05.37:788][  0]LogUObjectArray: 408 objects as part of root set at end of initial load.
CloseDisregardForGC: 0/0 objects in disregard for GC pool
2025-06-13 11:05:37.788 UnrealLightmass[13193:26636726] [UE] [2025.06.13-09.05.37:788][  0]LogUObjectArray: CloseDisregardForGC: 0/0 objects in disregard for GC pool
Using OS detected language (it).
2025-06-13 11:05:37.789 UnrealLightmass[13193:26636726] [UE] [2025.06.13-09.05.37:789][  0]LogInit: Using OS detected language (it).
Using OS detected locale (it-IT).
2025-06-13 11:05:37.789 UnrealLightmass[13193:26636726] [UE] [2025.06.13-09.05.37:789][  0]LogInit: Using OS detected locale (it-IT).
Using OS detected language (it).
2025-06-13 11:05:37.818 UnrealLightmass[13193:26636726] [UE] [2025.06.13-09.05.37:818][  0]LogInit: Using OS detected language (it).
Using OS detected locale (it-IT).
2025-06-13 11:05:37.818 UnrealLightmass[13193:26636726] [UE] [2025.06.13-09.05.37:818][  0]LogInit: Using OS detected locale (it-IT).
No localization for 'it' exists, so 'en' will be used for the language.
2025-06-13 11:05:37.818 UnrealLightmass[13193:26636726] [UE] [2025.06.13-09.05.37:818][  0]LogTextLocalizationManager: No localization for 'it' exists, so 'en' will be used for the language.
No localization for 'it-IT' exists, so 'en' will be used for the locale.
2025-06-13 11:05:37.818 UnrealLightmass[13193:26636726] [UE] [2025.06.13-09.05.37:818][  0]LogTextLocalizationManager: No localization for 'it-IT' exists, so 'en' will be used for the locale.
Processed 2 localized package path(s) for 1 prioritized culture(s) in 0.000508 seconds
2025-06-13 11:05:37.848 UnrealLightmass[13193:26636726] [UE] [2025.06.13-09.05.37:848][  0]LogPackageLocalizationCache: Processed 2 localized package path(s) for 1 prioritized culture(s) in 0.000508 seconds
LogUdpMessaging: Display: Work queue size set to 1024.
Work queue size set to 1024.
2025-06-13 11:05:37.850 UnrealLightmass[13193:26636726] [UE] [2025.06.13-09.05.37:850][  0]LogUdpMessaging: Display: Work queue size set to 1024.
Initializing bridge on interface 0.0.0.0:0 to multicast group 230.0.0.1:6666.
2025-06-13 11:05:37.850 UnrealLightmass[13193:26636726] [UE] [2025.06.13-09.05.37:850][  0]LogUdpMessaging: Initializing bridge on interface 0.0.0.0:0 to multicast group 230.0.0.1:6666.
LogUdpMessaging: Display: Unicast socket bound to '0.0.0.0:51334'.
Unicast socket bound to '0.0.0.0:51334'.
2025-06-13 11:05:37.851 UnrealLightmass[13193:26636726] [UE] [2025.06.13-09.05.37:851][  0]LogUdpMessaging: Display: Unicast socket bound to '0.0.0.0:51334'.
LogUdpMessaging: Display: Added local interface '172.16.70.61' to multicast group '230.0.0.1:6666'
Added local interface '172.16.70.61' to multicast group '230.0.0.1:6666'
2025-06-13 11:05:37.851 UnrealLightmass[13193:26636726] [UE] [2025.06.13-09.05.37:851][  0]LogUdpMessaging: Display: Added local interface '172.16.70.61' to multicast group '230.0.0.1:6666'
LogUdpMessaging: Display: Using asynchronous task graph for message deserialization.
Using asynchronous task graph for message deserialization.
2025-06-13 11:05:37.851 UnrealLightmass[13193:26636726] [UE] [2025.06.13-09.05.37:851][  0]LogUdpMessaging: Display: Using asynchronous task graph for message deserialization.
LogLightmass: Display: Lightmass Mac started on: Host-001.homenet.telecomitalia.it. Command-line:  -Messaging -nostdout
Lightmass Mac started on: Host-001.homenet.telecomitalia.it. Command-line:  -Messaging -nostdout
LogLightmass: Display: Processing scene GUID: 0000012300004567000089AB0000CDEF with 16 threads
2025-06-13 11:05:37.852 UnrealLightmass[13193:26636726] [UE] [2025.06.13-09.05.37:852][  0]LogLightmass: Display: Lightmass Mac started on: Host-001.homenet.telecomitalia.it. Command-line:  -Messaging -nostdout
Processing scene GUID: 0000012300004567000089AB0000CDEF with 16 threads
2025-06-13 11:05:37.852 UnrealLightmass[13193:26636726] [UE] [2025.06.13-09.05.37:852][  0]LogLightmass: Display: Processing scene GUID: 0000012300004567000089AB0000CDEF with 16 threads
Building static lighting...
2025-06-13 11:05:37.852 UnrealLightmass[13193:26636726] [UE] [2025.06.13-09.05.37:852][  0]LogLightmass: Building static lighting...
Failed to open scene channel with GUID {00000123}:{00004567}:{000089ab}:{0000cdef}
2025-06-13 11:05:44.412 UnrealLightmass[13193:26636726] [UE] [2025.06.13-09.05.44:412][  0]Failed to open scene channel with GUID {00000123}:{00004567}:{000089ab}:{0000cdef}
Failed to import scene file
2025-06-13 11:05:44.412 UnrealLightmass[13193:26636726] [UE] [2025.06.13-09.05.44:412][  0]LogLightmass: Failed to import scene file
[1]    13193 segmentation fault  ./UnrealLightmass
➜  Mac

And the crash dump

-------------------------------------
Translated Report (Full Report Below)
-------------------------------------

Process:               UnrealLightmass [13193]
Path:                  /Users/Shared/*/UnrealLightmass
Identifier:            UnrealLightmass
Version:               ???
Code Type:             X86-64 (Translated)
Parent Process:        zsh [12742]
Responsible:           ghostty [29506]
User ID:               501

Date/Time:             2025-06-13 11:05:44.4244 +0200
OS Version:            macOS 15.5 (24F74)
Report Version:        12
Anonymous UUID:        4705BAC8-0917-9224-B2D4-D658AA9FD286

Sleep/Wake UUID:       F45848F9-3924-4374-B367-DFABA9449221

Time Awake Since Boot: 340000 seconds
Time Since Wake:       5444 seconds

System Integrity Protection: enabled

Crashed Thread:        27  FUdpMessageProcessor.Sender

Exception Type:        EXC_BAD_ACCESS (SIGSEGV)
Exception Codes:       KERN_INVALID_ADDRESS at 0x0000000000000098
Exception Codes:       0x0000000000000001, 0x0000000000000098

Termination Reason:    Namespace SIGNAL, Code 11 Segmentation fault: 11
Terminating Process:   exc handler [13193]

VM Region Info: 0x98 is not in any region.  Bytes before following region: 4376870760
      REGION TYPE                    START - END         [ VSIZE] PRT/MAX SHRMOD  REGION DETAIL
      UNUSED SPACE AT START
--->  
      __TEXT                      104e1c000-104f07000    [  940K] r-x/r-x SM=COW  UnrealLightmass

Thread 0::  Dispatch queue: com.apple.main-thread
0   UnrealLightmass-Core.dylib    	       0x112b4e790 void DestructItems<TTuple<int, TSharedRef<IPackageStoreBackend, (ESPMode)1>>, int>(TTuple<int, TSharedRef<IPackageStoreBackend, (ESPMode)1>>*, int) + 0
1   UnrealLightmass-Core.dylib    	       0x112b14c35 FPackageStore::~FPackageStore() + 21
2   libsystem_c.dylib             	    0x7ff808968ea2 __cxa_finalize_ranges + 408
3   libsystem_c.dylib             	    0x7ff808968cbd exit + 35
4   UnrealLightmass               	       0x104e253d5 Lightmass::BuildStaticLighting(FGuid const&, int, bool) + 1589
5   UnrealLightmass               	       0x104e42bae Lightmass::LightmassMain(int, char**) + 1790
6   UnrealLightmass               	       0x104e434c7 main + 103
7   dyld                          	       0x20524c530 start + 3056

Thread 1:: com.apple.rosetta.exceptionserver
0   runtime                       	    0x7ff7ffc6b0e4 0x7ff7ffc67000 + 16612

Thread 2:: BackgroundThreadPool #0
0   ???                           	    0x7ff895fceae0 ???
1   libsystem_kernel.dylib        	    0x7ff808a5f6f6 __psynch_cvwait + 10
2   libsystem_pthread.dylib       	    0x7ff808a9f27a _pthread_cond_wait + 988
3   UnrealLightmass-Core.dylib    	       0x1129c1657 FPThreadEvent::Wait(unsigned int, bool) + 1159
4   UnrealLightmass-Core.dylib    	       0x112a3f5e1 FQueuedThread::Run() + 545
5   UnrealLightmass-Core.dylib    	       0x112a386cc FRunnableThreadPThread::Run() + 140
6   UnrealLightmass-Core.dylib    	       0x1129ec41e FRunnableThreadPThread::_ThreadProc(void*) + 78
7   libsystem_pthread.dylib       	    0x7ff808a9edf1 _pthread_start + 99
8   libsystem_pthread.dylib       	    0x7ff808a9a857 thread_start + 15

Thread 3:: BackgroundThreadPool #1
0   ???                           	    0x7ff895fceae0 ???
1   libsystem_kernel.dylib        	    0x7ff808a5f6f6 __psynch_cvwait + 10
2   libsystem_pthread.dylib       	    0x7ff808a9f27a _pthread_cond_wait + 988
3   UnrealLightmass-Core.dylib    	       0x1129c1657 FPThreadEvent::Wait(unsigned int, bool) + 1159
4   UnrealLightmass-Core.dylib    	       0x112a3f5e1 FQueuedThread::Run() + 545
5   UnrealLightmass-Core.dylib    	       0x112a386cc FRunnableThreadPThread::Run() + 140
6   UnrealLightmass-Core.dylib    	       0x1129ec41e FRunnableThreadPThread::_ThreadProc(void*) + 78
7   libsystem_pthread.dylib       	    0x7ff808a9edf1 _pthread_start + 99
8   libsystem_pthread.dylib       	    0x7ff808a9a857 thread_start + 15

Thread 4:: Foreground Worker #0
0   ???                           	    0x7ff895fceae0 ???
1   libsystem_kernel.dylib        	    0x7ff808a5f6f6 __psynch_cvwait + 10
2   libsystem_pthread.dylib       	    0x7ff808a9f27a _pthread_cond_wait + 988
3   UnrealLightmass-Core.dylib    	       0x1129c1657 FPThreadEvent::Wait(unsigned int, bool) + 1159
4   UnrealLightmass-Core.dylib    	       0x112870892 LowLevelTasks::Private::FWaitingQueue::Park(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::FOutOfWork&, int, int) + 194
5   UnrealLightmass-Core.dylib    	       0x11286b005 LowLevelTasks::Private::FWaitingQueue::CommitWait(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::FOutOfWork&, int, int) + 277
6   UnrealLightmass-Core.dylib    	       0x11286a4cf LowLevelTasks::FScheduler::WorkerLoop(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::TLocalQueueRegistry<1024u, 1024u>::TLocalQueue*, unsigned int, bool) + 95
7   UnrealLightmass-Core.dylib    	       0x11286b2b4 LowLevelTasks::FScheduler::WorkerMain(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::TLocalQueueRegistry<1024u, 1024u>::TLocalQueue*, unsigned int, bool) + 164
8   UnrealLightmass-Core.dylib    	       0x112a5d942 FThreadImpl::Run() + 50
9   UnrealLightmass-Core.dylib    	       0x112a386cc FRunnableThreadPThread::Run() + 140
10  UnrealLightmass-Core.dylib    	       0x1129ec41e FRunnableThreadPThread::_ThreadProc(void*) + 78
11  libsystem_pthread.dylib       	    0x7ff808a9edf1 _pthread_start + 99
12  libsystem_pthread.dylib       	    0x7ff808a9a857 thread_start + 15

Thread 5:: Foreground Worker #1
0   ???                           	    0x7ff895fceae0 ???
1   libsystem_kernel.dylib        	    0x7ff808a5f6f6 __psynch_cvwait + 10
2   libsystem_pthread.dylib       	    0x7ff808a9f27a _pthread_cond_wait + 988
3   UnrealLightmass-Core.dylib    	       0x1129c1657 FPThreadEvent::Wait(unsigned int, bool) + 1159
4   UnrealLightmass-Core.dylib    	       0x112870892 LowLevelTasks::Private::FWaitingQueue::Park(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::FOutOfWork&, int, int) + 194
5   UnrealLightmass-Core.dylib    	       0x11286b005 LowLevelTasks::Private::FWaitingQueue::CommitWait(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::FOutOfWork&, int, int) + 277
6   UnrealLightmass-Core.dylib    	       0x11286a4cf LowLevelTasks::FScheduler::WorkerLoop(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::TLocalQueueRegistry<1024u, 1024u>::TLocalQueue*, unsigned int, bool) + 95
7   UnrealLightmass-Core.dylib    	       0x11286b2b4 LowLevelTasks::FScheduler::WorkerMain(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::TLocalQueueRegistry<1024u, 1024u>::TLocalQueue*, unsigned int, bool) + 164
8   UnrealLightmass-Core.dylib    	       0x112a5d942 FThreadImpl::Run() + 50
9   UnrealLightmass-Core.dylib    	       0x112a386cc FRunnableThreadPThread::Run() + 140
10  UnrealLightmass-Core.dylib    	       0x1129ec41e FRunnableThreadPThread::_ThreadProc(void*) + 78
11  libsystem_pthread.dylib       	    0x7ff808a9edf1 _pthread_start + 99
12  libsystem_pthread.dylib       	    0x7ff808a9a857 thread_start + 15

Thread 6:: Background Worker #0
0   ???                           	    0x7ff895fceae0 ???
1   libsystem_kernel.dylib        	    0x7ff808a5f6f6 __psynch_cvwait + 10
2   libsystem_pthread.dylib       	    0x7ff808a9f27a _pthread_cond_wait + 988
3   UnrealLightmass-Core.dylib    	       0x1129c1657 FPThreadEvent::Wait(unsigned int, bool) + 1159
4   UnrealLightmass-Core.dylib    	       0x112870892 LowLevelTasks::Private::FWaitingQueue::Park(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::FOutOfWork&, int, int) + 194
5   UnrealLightmass-Core.dylib    	       0x11286b005 LowLevelTasks::Private::FWaitingQueue::CommitWait(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::FOutOfWork&, int, int) + 277
6   UnrealLightmass-Core.dylib    	       0x11286a4cf LowLevelTasks::FScheduler::WorkerLoop(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::TLocalQueueRegistry<1024u, 1024u>::TLocalQueue*, unsigned int, bool) + 95
7   UnrealLightmass-Core.dylib    	       0x11286b2b4 LowLevelTasks::FScheduler::WorkerMain(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::TLocalQueueRegistry<1024u, 1024u>::TLocalQueue*, unsigned int, bool) + 164
8   UnrealLightmass-Core.dylib    	       0x112a5d942 FThreadImpl::Run() + 50
9   UnrealLightmass-Core.dylib    	       0x112a386cc FRunnableThreadPThread::Run() + 140
10  UnrealLightmass-Core.dylib    	       0x1129ec41e FRunnableThreadPThread::_ThreadProc(void*) + 78
11  libsystem_pthread.dylib       	    0x7ff808a9edf1 _pthread_start + 99
12  libsystem_pthread.dylib       	    0x7ff808a9a857 thread_start + 15

Thread 7:: Background Worker #1
0   ???                           	    0x7ff895fceae0 ???
1   libsystem_kernel.dylib        	    0x7ff808a5f6f6 __psynch_cvwait + 10
2   libsystem_pthread.dylib       	    0x7ff808a9f27a _pthread_cond_wait + 988
3   UnrealLightmass-Core.dylib    	       0x1129c1657 FPThreadEvent::Wait(unsigned int, bool) + 1159
4   UnrealLightmass-Core.dylib    	       0x112870892 LowLevelTasks::Private::FWaitingQueue::Park(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::FOutOfWork&, int, int) + 194
5   UnrealLightmass-Core.dylib    	       0x11286b005 LowLevelTasks::Private::FWaitingQueue::CommitWait(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::FOutOfWork&, int, int) + 277
6   UnrealLightmass-Core.dylib    	       0x11286a4cf LowLevelTasks::FScheduler::WorkerLoop(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::TLocalQueueRegistry<1024u, 1024u>::TLocalQueue*, unsigned int, bool) + 95
7   UnrealLightmass-Core.dylib    	       0x11286b2b4 LowLevelTasks::FScheduler::WorkerMain(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::TLocalQueueRegistry<1024u, 1024u>::TLocalQueue*, unsigned int, bool) + 164
8   UnrealLightmass-Core.dylib    	       0x112a5d942 FThreadImpl::Run() + 50
9   UnrealLightmass-Core.dylib    	       0x112a386cc FRunnableThreadPThread::Run() + 140
10  UnrealLightmass-Core.dylib    	       0x1129ec41e FRunnableThreadPThread::_ThreadProc(void*) + 78
11  libsystem_pthread.dylib       	    0x7ff808a9edf1 _pthread_start + 99
12  libsystem_pthread.dylib       	    0x7ff808a9a857 thread_start + 15

Thread 8:: Background Worker #2
0   ???                           	    0x7ff895fceae0 ???
1   libsystem_kernel.dylib        	    0x7ff808a5f6f6 __psynch_cvwait + 10
2   libsystem_pthread.dylib       	    0x7ff808a9f27a _pthread_cond_wait + 988
3   UnrealLightmass-Core.dylib    	       0x1129c1657 FPThreadEvent::Wait(unsigned int, bool) + 1159
4   UnrealLightmass-Core.dylib    	       0x112870892 LowLevelTasks::Private::FWaitingQueue::Park(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::FOutOfWork&, int, int) + 194
5   UnrealLightmass-Core.dylib    	       0x11286b005 LowLevelTasks::Private::FWaitingQueue::CommitWait(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::FOutOfWork&, int, int) + 277
6   UnrealLightmass-Core.dylib    	       0x11286a4cf LowLevelTasks::FScheduler::WorkerLoop(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::TLocalQueueRegistry<1024u, 1024u>::TLocalQueue*, unsigned int, bool) + 95
7   UnrealLightmass-Core.dylib    	       0x11286b2b4 LowLevelTasks::FScheduler::WorkerMain(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::TLocalQueueRegistry<1024u, 1024u>::TLocalQueue*, unsigned int, bool) + 164
8   UnrealLightmass-Core.dylib    	       0x112a5d942 FThreadImpl::Run() + 50
9   UnrealLightmass-Core.dylib    	       0x112a386cc FRunnableThreadPThread::Run() + 140
10  UnrealLightmass-Core.dylib    	       0x1129ec41e FRunnableThreadPThread::_ThreadProc(void*) + 78
11  libsystem_pthread.dylib       	    0x7ff808a9edf1 _pthread_start + 99
12  libsystem_pthread.dylib       	    0x7ff808a9a857 thread_start + 15

Thread 9:: Background Worker #3
0   ???                           	    0x7ff895fceae0 ???
1   libsystem_kernel.dylib        	    0x7ff808a5f6f6 __psynch_cvwait + 10
2   libsystem_pthread.dylib       	    0x7ff808a9f27a _pthread_cond_wait + 988
3   UnrealLightmass-Core.dylib    	       0x1129c1657 FPThreadEvent::Wait(unsigned int, bool) + 1159
4   UnrealLightmass-Core.dylib    	       0x112870892 LowLevelTasks::Private::FWaitingQueue::Park(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::FOutOfWork&, int, int) + 194
5   UnrealLightmass-Core.dylib    	       0x11286b005 LowLevelTasks::Private::FWaitingQueue::CommitWait(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::FOutOfWork&, int, int) + 277
6   UnrealLightmass-Core.dylib    	       0x11286a4cf LowLevelTasks::FScheduler::WorkerLoop(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::TLocalQueueRegistry<1024u, 1024u>::TLocalQueue*, unsigned int, bool) + 95
7   UnrealLightmass-Core.dylib    	       0x11286b2b4 LowLevelTasks::FScheduler::WorkerMain(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::TLocalQueueRegistry<1024u, 1024u>::TLocalQueue*, unsigned int, bool) + 164
8   UnrealLightmass-Core.dylib    	       0x112a5d942 FThreadImpl::Run() + 50
9   UnrealLightmass-Core.dylib    	       0x112a386cc FRunnableThreadPThread::Run() + 140
10  UnrealLightmass-Core.dylib    	       0x1129ec41e FRunnableThreadPThread::_ThreadProc(void*) + 78
11  libsystem_pthread.dylib       	    0x7ff808a9edf1 _pthread_start + 99
12  libsystem_pthread.dylib       	    0x7ff808a9a857 thread_start + 15

Thread 10:: Background Worker #4
0   ???                           	    0x7ff895fceae0 ???
1   libsystem_kernel.dylib        	    0x7ff808a5f6f6 __psynch_cvwait + 10
2   libsystem_pthread.dylib       	    0x7ff808a9f27a _pthread_cond_wait + 988
3   UnrealLightmass-Core.dylib    	       0x1129c1657 FPThreadEvent::Wait(unsigned int, bool) + 1159
4   UnrealLightmass-Core.dylib    	       0x112870892 LowLevelTasks::Private::FWaitingQueue::Park(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::FOutOfWork&, int, int) + 194
5   UnrealLightmass-Core.dylib    	       0x11286b005 LowLevelTasks::Private::FWaitingQueue::CommitWait(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::FOutOfWork&, int, int) + 277
6   UnrealLightmass-Core.dylib    	       0x11286a4cf LowLevelTasks::FScheduler::WorkerLoop(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::TLocalQueueRegistry<1024u, 1024u>::TLocalQueue*, unsigned int, bool) + 95
7   UnrealLightmass-Core.dylib    	       0x11286b2b4 LowLevelTasks::FScheduler::WorkerMain(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::TLocalQueueRegistry<1024u, 1024u>::TLocalQueue*, unsigned int, bool) + 164
8   UnrealLightmass-Core.dylib    	       0x112a5d942 FThreadImpl::Run() + 50
9   UnrealLightmass-Core.dylib    	       0x112a386cc FRunnableThreadPThread::Run() + 140
10  UnrealLightmass-Core.dylib    	       0x1129ec41e FRunnableThreadPThread::_ThreadProc(void*) + 78
11  libsystem_pthread.dylib       	    0x7ff808a9edf1 _pthread_start + 99
12  libsystem_pthread.dylib       	    0x7ff808a9a857 thread_start + 15

Thread 11:: Background Worker #5
0   ???                           	    0x7ff895fceae0 ???
1   libsystem_kernel.dylib        	    0x7ff808a5f6f6 __psynch_cvwait + 10
2   libsystem_pthread.dylib       	    0x7ff808a9f27a _pthread_cond_wait + 988
3   UnrealLightmass-Core.dylib    	       0x1129c1657 FPThreadEvent::Wait(unsigned int, bool) + 1159
4   UnrealLightmass-Core.dylib    	       0x112870892 LowLevelTasks::Private::FWaitingQueue::Park(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::FOutOfWork&, int, int) + 194
5   UnrealLightmass-Core.dylib    	       0x11286b005 LowLevelTasks::Private::FWaitingQueue::CommitWait(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::FOutOfWork&, int, int) + 277
6   UnrealLightmass-Core.dylib    	       0x11286a4cf LowLevelTasks::FScheduler::WorkerLoop(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::TLocalQueueRegistry<1024u, 1024u>::TLocalQueue*, unsigned int, bool) + 95
7   UnrealLightmass-Core.dylib    	       0x11286b2b4 LowLevelTasks::FScheduler::WorkerMain(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::TLocalQueueRegistry<1024u, 1024u>::TLocalQueue*, unsigned int, bool) + 164
8   UnrealLightmass-Core.dylib    	       0x112a5d942 FThreadImpl::Run() + 50
9   UnrealLightmass-Core.dylib    	       0x112a386cc FRunnableThreadPThread::Run() + 140
10  UnrealLightmass-Core.dylib    	       0x1129ec41e FRunnableThreadPThread::_ThreadProc(void*) + 78
11  libsystem_pthread.dylib       	    0x7ff808a9edf1 _pthread_start + 99
12  libsystem_pthread.dylib       	    0x7ff808a9a857 thread_start + 15

Thread 12:: Background Worker #6
0   ???                           	    0x7ff895fceae0 ???
1   libsystem_kernel.dylib        	    0x7ff808a5f6f6 __psynch_cvwait + 10
2   libsystem_pthread.dylib       	    0x7ff808a9f27a _pthread_cond_wait + 988
3   UnrealLightmass-Core.dylib    	       0x1129c1657 FPThreadEvent::Wait(unsigned int, bool) + 1159
4   UnrealLightmass-Core.dylib    	       0x112870892 LowLevelTasks::Private::FWaitingQueue::Park(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::FOutOfWork&, int, int) + 194
5   UnrealLightmass-Core.dylib    	       0x11286b005 LowLevelTasks::Private::FWaitingQueue::CommitWait(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::FOutOfWork&, int, int) + 277
6   UnrealLightmass-Core.dylib    	       0x11286a4cf LowLevelTasks::FScheduler::WorkerLoop(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::TLocalQueueRegistry<1024u, 1024u>::TLocalQueue*, unsigned int, bool) + 95
7   UnrealLightmass-Core.dylib    	       0x11286b2b4 LowLevelTasks::FScheduler::WorkerMain(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::TLocalQueueRegistry<1024u, 1024u>::TLocalQueue*, unsigned int, bool) + 164
8   UnrealLightmass-Core.dylib    	       0x112a5d942 FThreadImpl::Run() + 50
9   UnrealLightmass-Core.dylib    	       0x112a386cc FRunnableThreadPThread::Run() + 140
10  UnrealLightmass-Core.dylib    	       0x1129ec41e FRunnableThreadPThread::_ThreadProc(void*) + 78
11  libsystem_pthread.dylib       	    0x7ff808a9edf1 _pthread_start + 99
12  libsystem_pthread.dylib       	    0x7ff808a9a857 thread_start + 15

Thread 13:: Background Worker #7
0   ???                           	    0x7ff895fceae0 ???
1   libsystem_kernel.dylib        	    0x7ff808a5f6f6 __psynch_cvwait + 10
2   libsystem_pthread.dylib       	    0x7ff808a9f27a _pthread_cond_wait + 988
3   UnrealLightmass-Core.dylib    	       0x1129c1657 FPThreadEvent::Wait(unsigned int, bool) + 1159
4   UnrealLightmass-Core.dylib    	       0x112870892 LowLevelTasks::Private::FWaitingQueue::Park(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::FOutOfWork&, int, int) + 194
5   UnrealLightmass-Core.dylib    	       0x11286b005 LowLevelTasks::Private::FWaitingQueue::CommitWait(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::FOutOfWork&, int, int) + 277
6   UnrealLightmass-Core.dylib    	       0x11286a4cf LowLevelTasks::FScheduler::WorkerLoop(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::TLocalQueueRegistry<1024u, 1024u>::TLocalQueue*, unsigned int, bool) + 95
7   UnrealLightmass-Core.dylib    	       0x11286b2b4 LowLevelTasks::FScheduler::WorkerMain(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::TLocalQueueRegistry<1024u, 1024u>::TLocalQueue*, unsigned int, bool) + 164
8   UnrealLightmass-Core.dylib    	       0x112a5d942 FThreadImpl::Run() + 50
9   UnrealLightmass-Core.dylib    	       0x112a386cc FRunnableThreadPThread::Run() + 140
10  UnrealLightmass-Core.dylib    	       0x1129ec41e FRunnableThreadPThread::_ThreadProc(void*) + 78
11  libsystem_pthread.dylib       	    0x7ff808a9edf1 _pthread_start + 99
12  libsystem_pthread.dylib       	    0x7ff808a9a857 thread_start + 15

Thread 14:: Background Worker #8
0   ???                           	    0x7ff895fceae0 ???
1   libsystem_kernel.dylib        	    0x7ff808a5f6f6 __psynch_cvwait + 10
2   libsystem_pthread.dylib       	    0x7ff808a9f27a _pthread_cond_wait + 988
3   UnrealLightmass-Core.dylib    	       0x1129c1657 FPThreadEvent::Wait(unsigned int, bool) + 1159
4   UnrealLightmass-Core.dylib    	       0x112870892 LowLevelTasks::Private::FWaitingQueue::Park(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::FOutOfWork&, int, int) + 194
5   UnrealLightmass-Core.dylib    	       0x11286b005 LowLevelTasks::Private::FWaitingQueue::CommitWait(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::FOutOfWork&, int, int) + 277
6   UnrealLightmass-Core.dylib    	       0x11286a4cf LowLevelTasks::FScheduler::WorkerLoop(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::TLocalQueueRegistry<1024u, 1024u>::TLocalQueue*, unsigned int, bool) + 95
7   UnrealLightmass-Core.dylib    	       0x11286b2b4 LowLevelTasks::FScheduler::WorkerMain(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::TLocalQueueRegistry<1024u, 1024u>::TLocalQueue*, unsigned int, bool) + 164
8   UnrealLightmass-Core.dylib    	       0x112a5d942 FThreadImpl::Run() + 50
9   UnrealLightmass-Core.dylib    	       0x112a386cc FRunnableThreadPThread::Run() + 140
10  UnrealLightmass-Core.dylib    	       0x1129ec41e FRunnableThreadPThread::_ThreadProc(void*) + 78
11  libsystem_pthread.dylib       	    0x7ff808a9edf1 _pthread_start + 99
12  libsystem_pthread.dylib       	    0x7ff808a9a857 thread_start + 15

Thread 15:: Background Worker #9
0   ???                           	    0x7ff895fceae0 ???
1   libsystem_kernel.dylib        	    0x7ff808a5f6f6 __psynch_cvwait + 10
2   libsystem_pthread.dylib       	    0x7ff808a9f27a _pthread_cond_wait + 988
3   UnrealLightmass-Core.dylib    	       0x1129c1657 FPThreadEvent::Wait(unsigned int, bool) + 1159
4   UnrealLightmass-Core.dylib    	       0x112870892 LowLevelTasks::Private::FWaitingQueue::Park(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::FOutOfWork&, int, int) + 194
5   UnrealLightmass-Core.dylib    	       0x11286b005 LowLevelTasks::Private::FWaitingQueue::CommitWait(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::FOutOfWork&, int, int) + 277
6   UnrealLightmass-Core.dylib    	       0x11286a4cf LowLevelTasks::FScheduler::WorkerLoop(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::TLocalQueueRegistry<1024u, 1024u>::TLocalQueue*, unsigned int, bool) + 95
7   UnrealLightmass-Core.dylib    	       0x11286b2b4 LowLevelTasks::FScheduler::WorkerMain(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::TLocalQueueRegistry<1024u, 1024u>::TLocalQueue*, unsigned int, bool) + 164
8   UnrealLightmass-Core.dylib    	       0x112a5d942 FThreadImpl::Run() + 50
9   UnrealLightmass-Core.dylib    	       0x112a386cc FRunnableThreadPThread::Run() + 140
10  UnrealLightmass-Core.dylib    	       0x1129ec41e FRunnableThreadPThread::_ThreadProc(void*) + 78
11  libsystem_pthread.dylib       	    0x7ff808a9edf1 _pthread_start + 99
12  libsystem_pthread.dylib       	    0x7ff808a9a857 thread_start + 15

Thread 16:: Background Worker #10
0   ???                           	    0x7ff895fceae0 ???
1   libsystem_kernel.dylib        	    0x7ff808a5f6f6 __psynch_cvwait + 10
2   libsystem_pthread.dylib       	    0x7ff808a9f27a _pthread_cond_wait + 988
3   UnrealLightmass-Core.dylib    	       0x1129c1657 FPThreadEvent::Wait(unsigned int, bool) + 1159
4   UnrealLightmass-Core.dylib    	       0x112870892 LowLevelTasks::Private::FWaitingQueue::Park(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::FOutOfWork&, int, int) + 194
5   UnrealLightmass-Core.dylib    	       0x11286b005 LowLevelTasks::Private::FWaitingQueue::CommitWait(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::FOutOfWork&, int, int) + 277
6   UnrealLightmass-Core.dylib    	       0x11286a4cf LowLevelTasks::FScheduler::WorkerLoop(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::TLocalQueueRegistry<1024u, 1024u>::TLocalQueue*, unsigned int, bool) + 95
7   UnrealLightmass-Core.dylib    	       0x11286b2b4 LowLevelTasks::FScheduler::WorkerMain(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::TLocalQueueRegistry<1024u, 1024u>::TLocalQueue*, unsigned int, bool) + 164
8   UnrealLightmass-Core.dylib    	       0x112a5d942 FThreadImpl::Run() + 50
9   UnrealLightmass-Core.dylib    	       0x112a386cc FRunnableThreadPThread::Run() + 140
10  UnrealLightmass-Core.dylib    	       0x1129ec41e FRunnableThreadPThread::_ThreadProc(void*) + 78
11  libsystem_pthread.dylib       	    0x7ff808a9edf1 _pthread_start + 99
12  libsystem_pthread.dylib       	    0x7ff808a9a857 thread_start + 15

Thread 17:: Background Worker #11
0   ???                           	    0x7ff895fceae0 ???
1   libsystem_kernel.dylib        	    0x7ff808a5f6f6 __psynch_cvwait + 10
2   libsystem_pthread.dylib       	    0x7ff808a9f27a _pthread_cond_wait + 988
3   UnrealLightmass-Core.dylib    	       0x1129c1657 FPThreadEvent::Wait(unsigned int, bool) + 1159
4   UnrealLightmass-Core.dylib    	       0x112870892 LowLevelTasks::Private::FWaitingQueue::Park(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::FOutOfWork&, int, int) + 194
5   UnrealLightmass-Core.dylib    	       0x11286b005 LowLevelTasks::Private::FWaitingQueue::CommitWait(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::FOutOfWork&, int, int) + 277
6   UnrealLightmass-Core.dylib    	       0x11286a4cf LowLevelTasks::FScheduler::WorkerLoop(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::TLocalQueueRegistry<1024u, 1024u>::TLocalQueue*, unsigned int, bool) + 95
7   UnrealLightmass-Core.dylib    	       0x11286b2b4 LowLevelTasks::FScheduler::WorkerMain(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::TLocalQueueRegistry<1024u, 1024u>::TLocalQueue*, unsigned int, bool) + 164
8   UnrealLightmass-Core.dylib    	       0x112a5d942 FThreadImpl::Run() + 50
9   UnrealLightmass-Core.dylib    	       0x112a386cc FRunnableThreadPThread::Run() + 140
10  UnrealLightmass-Core.dylib    	       0x1129ec41e FRunnableThreadPThread::_ThreadProc(void*) + 78
11  libsystem_pthread.dylib       	    0x7ff808a9edf1 _pthread_start + 99
12  libsystem_pthread.dylib       	    0x7ff808a9a857 thread_start + 15

Thread 18:: Background Worker #12
0   ???                           	    0x7ff895fceae0 ???
1   libsystem_kernel.dylib        	    0x7ff808a5f6f6 __psynch_cvwait + 10
2   libsystem_pthread.dylib       	    0x7ff808a9f27a _pthread_cond_wait + 988
3   UnrealLightmass-Core.dylib    	       0x1129c1657 FPThreadEvent::Wait(unsigned int, bool) + 1159
4   UnrealLightmass-Core.dylib    	       0x112870892 LowLevelTasks::Private::FWaitingQueue::Park(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::FOutOfWork&, int, int) + 194
5   UnrealLightmass-Core.dylib    	       0x11286b005 LowLevelTasks::Private::FWaitingQueue::CommitWait(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::FOutOfWork&, int, int) + 277
6   UnrealLightmass-Core.dylib    	       0x11286a4cf LowLevelTasks::FScheduler::WorkerLoop(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::TLocalQueueRegistry<1024u, 1024u>::TLocalQueue*, unsigned int, bool) + 95
7   UnrealLightmass-Core.dylib    	       0x11286b2b4 LowLevelTasks::FScheduler::WorkerMain(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::TLocalQueueRegistry<1024u, 1024u>::TLocalQueue*, unsigned int, bool) + 164
8   UnrealLightmass-Core.dylib    	       0x112a5d942 FThreadImpl::Run() + 50
9   UnrealLightmass-Core.dylib    	       0x112a386cc FRunnableThreadPThread::Run() + 140
10  UnrealLightmass-Core.dylib    	       0x1129ec41e FRunnableThreadPThread::_ThreadProc(void*) + 78
11  libsystem_pthread.dylib       	    0x7ff808a9edf1 _pthread_start + 99
12  libsystem_pthread.dylib       	    0x7ff808a9a857 thread_start + 15

Thread 19:
0   runtime                       	    0x7ff7ffc899b0 0x7ff7ffc67000 + 141744

Thread 20:: OutputDeviceRedirector
0   ???                           	    0x7ff895fceae0 ???
1   libsystem_kernel.dylib        	    0x7ff808a5f6f6 __psynch_cvwait + 10
2   libsystem_pthread.dylib       	    0x7ff808a9f27a _pthread_cond_wait + 988
3   libc++.1.dylib                	    0x7ff8089e18b0 std::__1::condition_variable::wait(std::__1::unique_lock<std::__1::mutex>&) + 18
4   UnrealLightmass-Core.dylib    	       0x1129b116b UE::HAL::Private::FGenericPlatformManualResetEvent::WaitUntil(UE::FMonotonicTimePoint) + 107
5   UnrealLightmass-Core.dylib    	       0x1128727dc UE::ParkingLot::Private::WaitUntil(void const*, TFunctionRef<bool ()> const&, TFunctionRef<void ()> const&, UE::FMonotonicTimePoint) + 204
6   UnrealLightmass-Core.dylib    	       0x112cc98dc UE::Private::FOutputDeviceRedirectorState::ThreadLoop() + 604
7   UnrealLightmass-Core.dylib    	       0x112a5d942 FThreadImpl::Run() + 50
8   UnrealLightmass-Core.dylib    	       0x112a386cc FRunnableThreadPThread::Run() + 140
9   UnrealLightmass-Core.dylib    	       0x1129ec41e FRunnableThreadPThread::_ThreadProc(void*) + 78
10  libsystem_pthread.dylib       	    0x7ff808a9edf1 _pthread_start + 99
11  libsystem_pthread.dylib       	    0x7ff808a9a857 thread_start + 15

Thread 21:: IOThreadPool #0
0   ???                           	    0x7ff895fceae0 ???
1   libsystem_kernel.dylib        	    0x7ff808a5f6f6 __psynch_cvwait + 10
2   libsystem_pthread.dylib       	    0x7ff808a9f27a _pthread_cond_wait + 988
3   UnrealLightmass-Core.dylib    	       0x1129c1657 FPThreadEvent::Wait(unsigned int, bool) + 1159
4   UnrealLightmass-Core.dylib    	       0x112a3f5e1 FQueuedThread::Run() + 545
5   UnrealLightmass-Core.dylib    	       0x112a386cc FRunnableThreadPThread::Run() + 140
6   UnrealLightmass-Core.dylib    	       0x1129ec41e FRunnableThreadPThread::_ThreadProc(void*) + 78
7   libsystem_pthread.dylib       	    0x7ff808a9edf1 _pthread_start + 99
8   libsystem_pthread.dylib       	    0x7ff808a9a857 thread_start + 15

Thread 22:: IOThreadPool #1
0   ???                           	    0x7ff895fceae0 ???
1   libsystem_kernel.dylib        	    0x7ff808a5f6f6 __psynch_cvwait + 10
2   libsystem_pthread.dylib       	    0x7ff808a9f27a _pthread_cond_wait + 988
3   UnrealLightmass-Core.dylib    	       0x1129c1657 FPThreadEvent::Wait(unsigned int, bool) + 1159
4   UnrealLightmass-Core.dylib    	       0x112a3f5e1 FQueuedThread::Run() + 545
5   UnrealLightmass-Core.dylib    	       0x112a386cc FRunnableThreadPThread::Run() + 140
6   UnrealLightmass-Core.dylib    	       0x1129ec41e FRunnableThreadPThread::_ThreadProc(void*) + 78
7   libsystem_pthread.dylib       	    0x7ff808a9edf1 _pthread_start + 99
8   libsystem_pthread.dylib       	    0x7ff808a9a857 thread_start + 15

Thread 23:: IOThreadPool #2
0   ???                           	    0x7ff895fceae0 ???
1   libsystem_kernel.dylib        	    0x7ff808a5f6f6 __psynch_cvwait + 10
2   libsystem_pthread.dylib       	    0x7ff808a9f27a _pthread_cond_wait + 988
3   UnrealLightmass-Core.dylib    	       0x1129c1657 FPThreadEvent::Wait(unsigned int, bool) + 1159
4   UnrealLightmass-Core.dylib    	       0x112a3f5e1 FQueuedThread::Run() + 545
5   UnrealLightmass-Core.dylib    	       0x112a386cc FRunnableThreadPThread::Run() + 140
6   UnrealLightmass-Core.dylib    	       0x1129ec41e FRunnableThreadPThread::_ThreadProc(void*) + 78
7   libsystem_pthread.dylib       	    0x7ff808a9edf1 _pthread_start + 99
8   libsystem_pthread.dylib       	    0x7ff808a9a857 thread_start + 15

Thread 24:: IOThreadPool #3
0   ???                           	    0x7ff895fceae0 ???
1   libsystem_kernel.dylib        	    0x7ff808a5f6f6 __psynch_cvwait + 10
2   libsystem_pthread.dylib       	    0x7ff808a9f27a _pthread_cond_wait + 988
3   UnrealLightmass-Core.dylib    	       0x1129c1657 FPThreadEvent::Wait(unsigned int, bool) + 1159
4   UnrealLightmass-Core.dylib    	       0x112a3f5e1 FQueuedThread::Run() + 545
5   UnrealLightmass-Core.dylib    	       0x112a386cc FRunnableThreadPThread::Run() + 140
6   UnrealLightmass-Core.dylib    	       0x1129ec41e FRunnableThreadPThread::_ThreadProc(void*) + 78
7   libsystem_pthread.dylib       	    0x7ff808a9edf1 _pthread_start + 99
8   libsystem_pthread.dylib       	    0x7ff808a9a857 thread_start + 15

Thread 25:: FMessageBus.DefaultBus.Router
0   ???                           	    0x7ff895fceae0 ???
1   libsystem_kernel.dylib        	    0x7ff808a5f6f6 __psynch_cvwait + 10
2   libsystem_pthread.dylib       	    0x7ff808a9f27a _pthread_cond_wait + 988
3   UnrealLightmass-Core.dylib    	       0x1129c1514 FPThreadEvent::Wait(unsigned int, bool) + 836
4   UnrealLightmass-Messaging.dylib	       0x10dd9c3ab FMessageRouter::Run() + 219
5   UnrealLightmass-Core.dylib    	       0x112a386cc FRunnableThreadPThread::Run() + 140
6   UnrealLightmass-Core.dylib    	       0x1129ec41e FRunnableThreadPThread::_ThreadProc(void*) + 78
7   libsystem_pthread.dylib       	    0x7ff808a9edf1 _pthread_start + 99
8   libsystem_pthread.dylib       	    0x7ff808a9a857 thread_start + 15

Thread 26:: FUdpMessageBeacon
0   ???                           	    0x7ff895fceae0 ???
1   libsystem_kernel.dylib        	    0x7ff808a5f6f6 __psynch_cvwait + 10
2   libsystem_pthread.dylib       	    0x7ff808a9f27a _pthread_cond_wait + 988
3   UnrealLightmass-Core.dylib    	       0x1129c1514 FPThreadEvent::Wait(unsigned int, bool) + 836
4   UnrealLightmass-UdpMessaging.dylib	       0x10df5aaeb FUdpMessageBeacon::Run() + 139
5   UnrealLightmass-Core.dylib    	       0x112a386cc FRunnableThreadPThread::Run() + 140
6   UnrealLightmass-Core.dylib    	       0x1129ec41e FRunnableThreadPThread::_ThreadProc(void*) + 78
7   libsystem_pthread.dylib       	    0x7ff808a9edf1 _pthread_start + 99
8   libsystem_pthread.dylib       	    0x7ff808a9a857 thread_start + 15

Thread 27 Crashed:: FUdpMessageProcessor.Sender
0   UnrealLightmass-UdpMessaging.dylib	       0x10df8d889 FUdpSocketSender::Update(FTimespan const&) + 185
1   UnrealLightmass-UdpMessaging.dylib	       0x10df8d62b FUdpSocketSender::Run() + 59
2   UnrealLightmass-Core.dylib    	       0x112a386cc FRunnableThreadPThread::Run() + 140
3   UnrealLightmass-Core.dylib    	       0x1129ec41e FRunnableThreadPThread::_ThreadProc(void*) + 78
4   libsystem_pthread.dylib       	    0x7ff808a9edf1 _pthread_start + 99
5   libsystem_pthread.dylib       	    0x7ff808a9a857 thread_start + 15

Thread 28:: UdpMessageMulticastReceiver
0   ???                           	    0x7ff895fceae0 ???
1   libsystem_kernel.dylib        	    0x7ff808a638f2 poll + 10
2   UnrealLightmass-Sockets.dylib 	       0x10d8c3091 FSocketBSD::HasState(ESocketBSDParam, FTimespan) + 81
3   UnrealLightmass-Sockets.dylib 	       0x10d8c230c FSocketBSD::Wait(ESocketWaitConditions::Type, FTimespan) + 44
4   UnrealLightmass-UdpMessaging.dylib	       0x10df80ed9 FUdpSocketReceiver::Update(FTimespan const&) + 41
5   UnrealLightmass-UdpMessaging.dylib	       0x10df80cab FUdpSocketReceiver::Run() + 43
6   UnrealLightmass-Core.dylib    	       0x112a386cc FRunnableThreadPThread::Run() + 140
7   UnrealLightmass-Core.dylib    	       0x1129ec41e FRunnableThreadPThread::_ThreadProc(void*) + 78
8   libsystem_pthread.dylib       	    0x7ff808a9edf1 _pthread_start + 99
9   libsystem_pthread.dylib       	    0x7ff808a9a857 thread_start + 15

Thread 29:: UdpMessageUnicastReceiver
0   ???                           	    0x7ff895fceae0 ???
1   libsystem_kernel.dylib        	    0x7ff808a638f2 poll + 10
2   UnrealLightmass-Sockets.dylib 	       0x10d8c3091 FSocketBSD::HasState(ESocketBSDParam, FTimespan) + 81
3   UnrealLightmass-Sockets.dylib 	       0x10d8c230c FSocketBSD::Wait(ESocketWaitConditions::Type, FTimespan) + 44
4   UnrealLightmass-UdpMessaging.dylib	       0x10df80ed9 FUdpSocketReceiver::Update(FTimespan const&) + 41
5   UnrealLightmass-UdpMessaging.dylib	       0x10df80cab FUdpSocketReceiver::Run() + 43
6   UnrealLightmass-Core.dylib    	       0x112a386cc FRunnableThreadPThread::Run() + 140
7   UnrealLightmass-Core.dylib    	       0x1129ec41e FRunnableThreadPThread::_ThreadProc(void*) + 78
8   libsystem_pthread.dylib       	    0x7ff808a9edf1 _pthread_start + 99
9   libsystem_pthread.dylib       	    0x7ff808a9a857 thread_start + 15

Thread 30:: FUdpMessageProcessor
0   ???                           	    0x7ff895fceae0 ???
1   libsystem_kernel.dylib        	    0x7ff808a5f6f6 __psynch_cvwait + 10
2   libsystem_pthread.dylib       	    0x7ff808a9f27a _pthread_cond_wait + 988
3   UnrealLightmass-Core.dylib    	       0x1129c1514 FPThreadEvent::Wait(unsigned int, bool) + 836
4   UnrealLightmass-UdpMessaging.dylib	       0x10df5ffef FUdpMessageProcessor::Run() + 159
5   UnrealLightmass-Core.dylib    	       0x112a386cc FRunnableThreadPThread::Run() + 140
6   UnrealLightmass-Core.dylib    	       0x1129ec41e FRunnableThreadPThread::_ThreadProc(void*) + 78
7   libsystem_pthread.dylib       	    0x7ff808a9edf1 _pthread_start + 99
8   libsystem_pthread.dylib       	    0x7ff808a9a857 thread_start + 15


Thread 27 crashed with X86 Thread State (64-bit):
  rax: 0x0000000000000000  rbx: 0x0000600000f84158  rcx: 0x00000000de07b808  rdx: 0x0000000000000000
  rdi: 0x00000003146d7ec0  rsi: 0x00006000014daad0  rbp: 0x00000003146d7f20  rsp: 0x00000003146d7eb0
   r8: 0x00000000de27c006   r9: 0x00000000000000ff  r10: 0x00000000de200000  r11: 0x0000000000000008
  r12: 0x00007fd495104090  r13: 0x0000600000fdd610  r14: 0x0000600000f84110  r15: 0x000000000000011e
  rip: 0x000000010df8d889  rfl: 0x0000000000000202
 tmp0: 0x00006000014daad0 tmp1: 0x000000010df8d852 tmp2: 0x000000010e06be30


Binary Images:
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    0x7ff7ffc67000 -     0x7ff7ffc96fff runtime (*) <fe40a70a-33e8-3d5c-b196-d104da35046d> /usr/libexec/rosetta/runtime
       0x10d10f000 -        0x10d176fff libRosettaRuntime (*) <7742e99c-2006-3006-bc1e-1869448c6224> /Library/Apple/*/libRosettaRuntime
       0x104e1c000 -        0x104f06fff UnrealLightmass (*) <a5794d7c-18e5-3ab5-b77f-94e3061661b7> */UnrealLightmass
       0x10d748000 -        0x10d769fff libtbb.12.dylib (*) <8e1e9e76-70d3-3448-924a-80557bff1148> /Users/Shared/*/libtbb.12.dylib
       0x10d6d3000 -        0x10d6e1fff libtbbmalloc.2.dylib (*) <c47cf989-6631-3665-■■■1-c464528c8a82> /Users/Shared/*/libtbbmalloc.2.dylib
       0x10f57e000 -        0x110111fff libembree4.4.dylib (*) <39385860-a2c3-36ff-a13a-ce51ed8c186c> /Users/Shared/*/libembree4.4.dylib
       0x112546000 -        0x113472fff UnrealLightmass-Core.dylib (*) <1ea5a104-65cf-31fd-86de-7e4ff3c7c0da> /Users/Shared/*/UnrealLightmass-Core.dylib
       0x115971000 -        0x1161fafff UnrealLightmass-CoreUObject.dylib (*) <1bc2192e-b399-339a-8717-6f026351f248> /Users/Shared/*/UnrealLightmass-CoreUObject.dylib
       0x10d828000 -        0x10d841fff UnrealLightmass-SwarmInterface.dylib (*) <dd9d75d5-3ced-3b64-92eb-ac81dcedec5c> /Users/Shared/*/UnrealLightmass-SwarmInterface.dylib
       0x10d9b4000 -        0x10da41fff UnrealLightmass-Projects.dylib (*) <9a1495eb-6d59-3fe4-866e-732f1f337b9d> /Users/Shared/*/UnrealLightmass-Projects.dylib
       0x10dbb9000 -        0x10dc0ffff UnrealLightmass-ApplicationCore.dylib (*) <7bd47bc5-f707-3772-b2d2-84a33cac0421> /Users/Shared/*/UnrealLightmass-ApplicationCore.dylib
       0x10d698000 -        0x10d6a0fff UnrealLightmass-Networking.dylib (*) <f21bf51c-bf21-3f47-a9b4-2ab3dc1a06f4> /Users/Shared/*/UnrealLightmass-Networking.dylib
       0x10d8ba000 -        0x10d8dcfff UnrealLightmass-Sockets.dylib (*) <d7951b6e-5501-3a62-8a14-6b4f808926ea> /Users/Shared/*/UnrealLightmass-Sockets.dylib
       0x10dd91000 -        0x10ddc7fff UnrealLightmass-Messaging.dylib (*) <ef177340-1442-34c8-87ea-4dfb30e870ec> /Users/Shared/*/UnrealLightmass-Messaging.dylib
       0x10df4d000 -        0x10dfadfff UnrealLightmass-UdpMessaging.dylib (*) <1e178e50-f197-3032-9f6e-3b1259485c3f> /Users/Shared/*/UnrealLightmass-UdpMessaging.dylib
       0x10d6be000 -        0x10d6bffff UnrealLightmass-BuildSettings.dylib (*) <b00b4fe1-3d6f-37f1-86cf-24bf951a45d6> /Users/Shared/*/UnrealLightmass-BuildSettings.dylib
       0x10d729000 -        0x10d72afff UnrealLightmass-AutoRTFM.dylib (*) <ae92c873-9e49-3a9f-9faf-4368b89b1a8f> /Users/Shared/*/UnrealLightmass-AutoRTFM.dylib
       0x10d7dd000 -        0x10d7eafff UnrealLightmass-TraceLog.dylib (*) <0341c1a2-cfba-3b03-afa1-6fdbf47d7bc8> /Users/Shared/*/UnrealLightmass-TraceLog.dylib
       0x10e1a9000 -        0x10e225fff UnrealLightmass-Json.dylib (*) <13bbb03e-962d-3085-8793-44831d7fc729> /Users/Shared/*/UnrealLightmass-Json.dylib
       0x10e60c000 -        0x10e74ffff UnrealLightmass-DerivedDataCache.dylib (*) <20702c3d-6661-3d51-a0d0-28440a155ece> /Users/Shared/*/UnrealLightmass-DerivedDataCache.dylib
       0x10d80e000 -        0x10d812fff UnrealLightmass-CorePreciseFP.dylib (*) <15775cf7-69fd-38e7-a4f8-a8854bf1fe74> /Users/Shared/*/UnrealLightmass-CorePreciseFP.dylib
       0x11771f000 -        0x117a25fff UnrealLightmass-DevHttp.dylib (*) <878beadf-bfc6-3006-934a-c573ac91632e> /Users/Shared/*/UnrealLightmass-DevHttp.dylib
       0x117fc8000 -        0x11830ffff UnrealLightmass-Zen.dylib (*) <39292c97-71b2-3c9e-b83e-2d384d59cf33> /Users/Shared/*/UnrealLightmass-Zen.dylib
       0x10ee69000 -        0x10f095fff UnrealLightmass-SSL.dylib (*) <30bd1e9d-fe10-3bbb-b6d6-3c2e9b6d7a07> /Users/Shared/*/UnrealLightmass-SSL.dylib
       0x10d94b000 -        0x10d94ffff UnrealLightmass-NetCommon.dylib (*) <e4c9198b-1624-390a-990e-d7696aa56997> /Users/Shared/*/UnrealLightmass-NetCommon.dylib
       0x10d979000 -        0x10d981fff UnrealLightmass-Cbor.dylib (*) <1c644e49-3058-3214-9a68-0e32a0bf21f4> /Users/Shared/*/UnrealLightmass-Cbor.dylib
       0x10e364000 -        0x10e3d1fff UnrealLightmass-Serialization.dylib (*) <19292fe9-e70a-3c31-8884-3160fab248c5> /Users/Shared/*/UnrealLightmass-Serialization.dylib
    0x7ff80893d000 -     0x7ff8089c5ca7 libsystem_c.dylib (*) <19f23df9-b4a5-3be3-8777-5c8f0c5a43c8> /usr/lib/system/libsystem_c.dylib
               0x0 - 0xffffffffffffffff ??? (*) <00000000-0000-0000-0000-000000000000> ???
    0x7ff808a5c000 -     0x7ff808a98b4f libsystem_kernel.dylib (*) <dab10aa4-8afa-3d02-9cde-6023554ac858> /usr/lib/system/libsystem_kernel.dylib
    0x7ff808a99000 -     0x7ff808aa4dcf libsystem_pthread.dylib (*) <a6d1f05a-0743-31b7-9fe2-268f06ccd51a> /usr/lib/system/libsystem_pthread.dylib
    0x7ff8089c6000 -     0x7ff808a44fff libc++.1.dylib (*) <e9b27e7e-c40d-3405-a371-a753e116f54f> /usr/lib/libc++.1.dylib

External Modification Summary:
  Calls made by other processes targeting this process:
    task_for_pid: 0
    thread_create: 0
    thread_set_state: 0
  Calls made by this process:
    task_for_pid: 0
    thread_create: 0
    thread_set_state: 0
  Calls made by all processes on this machine:
    task_for_pid: 31
    thread_create: 0
    thread_set_state: 454

VM Region Summary:
ReadOnly portion of Libraries: Total=680.3M resident=0K(0%) swapped_out_or_unallocated=680.3M(100%)
Writable regions: Total=1.6G written=2291K(0%) resident=2291K(0%) swapped_out=0K(0%) unallocated=1.6G(100%)

                                VIRTUAL   REGION 
REGION TYPE                        SIZE    COUNT (non-coalesced) 
===========                     =======  ======= 
Activity Tracing                   256K        1 
ColorSync                          160K       23 
CoreGraphics                         8K        2 
Kernel Alloc Once                    8K        1 
MALLOC                           825.9M       53 
MALLOC guard page                  192K       12 
Memory Tag 240                      32K        1 
Memory Tag 240 (reserved)         3664K        1         reserved VM address space (unallocated)
Memory Tag 241                   128.0M        1 
Memory Tag 241 (reserved)        384.1M        1         reserved VM address space (unallocated)
Rosetta Arena                     4096K        2 
Rosetta Generic                   1232K      305 
Rosetta IndirectBranch             256K        1 
Rosetta JIT                      128.0M        1 
Rosetta Return Stack               620K       62 
Rosetta Thread Context             620K       62 
STACK GUARD                          4K        1 
Stack                            120.7M       30 
Stack Guard                       56.1M       29 
VM_ALLOCATE                       2600K       26 
VM_ALLOCATE (reserved)              16K        4         reserved VM address space (unallocated)
__CTF                               824        1 
__DATA                            11.2M      492 
__DATA_CONST                      50.3M      509 
__DATA_DIRTY                       841K      144 
__FONT_DATA                        2352        1 
__LINKEDIT                       185.8M       31 
__OBJC_RO                         61.3M        1 
__OBJC_RW                         2393K        1 
__TEXT                           494.5M      523 
__TPRO_CONST                         8K        2 
mapped file                      131.2M       84 
page table in kernel              2291K        1 
shared memory                      816K       13 
===========                     =======  ======= 
TOTAL                              2.5G     2422 
TOTAL, minus reserved VM space     2.2G     2422