5.7.0 MacOS SM5 - development package crash after streaming data in (both spatial and explicit load of data layer) (unstable)

General Feedback & Requests
1

log follows:

…
LogOutputDevice: Warning:

Script Stack (0 frames) :

2025-11-28 22:18:47.397 one[2358:60576] [UE] Assertion failed: ComponentsToUpdate.IsValidIndex(ArrayIndex) [File:./Runtime/Engine/Private/LevelTick.cpp] [Line: 986]

LogMac: Error: appError called: Assertion failed: ComponentsToUpdate.IsValidIndex(ArrayIndex) [File:./Runtime/Engine/Private/LevelTick.cpp] [Line: 986]

LogAudioMixer: Display: Audio Buffer Underrun (starvation) detected. InstanceID=1
2025-11-28 22:18:48.398 one[2358:60576] [UE] Additional Crash Context (Key=“Breadcrumbs_Parallel_0”, Value="Breadcrumbs ‘Parallel’

  • Translucency
  • Scene
  • RenderGraphExecute - /ViewFamilies
  • SceneRender - ViewFamilies
  • Frame 63931
    ")
    LogRHI: Error: Breadcrumbs ‘Parallel’
  • Translucency
  • Scene
  • RenderGraphExecute - /ViewFamilies
  • SceneRender - ViewFamilies
  • Frame 63931

2025-11-28 22:18:48.399 one[2358:60576] [UE] Additional Crash Context (Key=“Breadcrumbs_Parallel_1”, Value="Breadcrumbs ‘Parallel’

  • TextureDownsampleChain
  • PostProcessing
  • Scene
  • RenderGraphExecute - /ViewFamilies
  • SceneRender - ViewFamilies
  • Frame 63931
    ")
    LogRHI: Error: Breadcrumbs ‘Parallel’
  • TextureDownsampleChain
  • PostProcessing
  • Scene
  • RenderGraphExecute - /ViewFamilies
  • SceneRender - ViewFamilies
  • Frame 63931

LogPakFile: Display: Found Pak file ../../../Engine/Programs/CrashReportClient/Content/Paks/CrashReportClient.pak attempting to mount.
LogPakFile: Display: Mounting pak file ../../../Engine/Programs/CrashReportClient/Content/Paks/CrashReportClient.pak.
LogPakFile: Display: Mounted Pak file ‘../../../Engine/Programs/CrashReportClient/Content/Paks/CrashReportClient.pak’, mount point: ‘../../../Engine/’
LogPaths: Warning: No paths for game localization data were specifed in the game configuration.
LogInit: Warning: No paths for engine localization data were specifed in the engine configuration.
CrashReportCoreLog: Display: Applying project settings from ‘/Users/hummy/Library/Containers/com.YourCompany.one/Data/Library/Application Support/Epic/UnrealEngine/5.7/Saved/Crashes/CrashReport-UE-one-pid-2358-A1CA5DD46A4689458AF53D8070E1261B/CrashReportClient.ini’.
UNSUPPORTED (log once): POSSIBLE ISSUE: unit 0 GLD_TEXTURE_INDEX_RECTANGLE is unloadable and bound to sampler type (Float) - using zero texture because texture unloadable

2

What’s worse about 5.7.0, it tends to hang WindowServer dead in Tahoe, both vanilla editor and dev package, which wasn’t there in 5.6.* and was previously observed only in early versions of UE5

3

Screenshot 2025-12-02 at 01.02.47
Screenshot 2025-12-02 at 01.02.471566×1400 958 KB

besides that, looks like random mips of random streaming textures get corrupted (unstable)

4

shader compiler crashes compiling content from matrix awakens demo with virtual textures support enabled in project (5.7.0, 5.7.1)

UATHelper: Cooking (Mac): 2025-12-02 20:02:51.672 UnrealEditor[69367:4772973] [UE] Assertion failed: TextureIndices [File:./Developer/Apple/MetalShaderFormat/Private/MetalCompileShaderSPIRV.cpp] [Line: 796]
UATHelper: Cooking (Mac):
UATHelper: Error: Cooking (Mac): LogMac: Error: appError called: Assertion failed: TextureIndices [File:./Developer/Apple/MetalShaderFormat/Private/MetalCompileShaderSPIRV.cpp] [Line: 796]
UATHelper: Cooking (Mac):
UATHelper: Cooking (Mac):
UATHelper: Cooking (Mac): 2025-12-02 20:02:53.764 UnrealEditor[69367:4772973] [UE] Additional Crash Context (Key=“ActivePackage”, Value=“/Game/MetaHumans/Common/Face/Textures/Utilities/AnimMasks/T_head_wm2_msk_03”)
UATHelper: Cooking (Mac): LogAnalytics: Display: [CrashReporter.Release] AnalyticsET::StartSession ( APIServer = https://datarouter.ol.epicgames.com/datarouter/api/v1/public/data. AppVersion = ++UE5+Release-5.7-CL-48512491 )
UATHelper: Cooking (Mac): CrashReportCoreLog: Display: Applying project settings from ‘/Users/hummy/Library/Application Support/Epic/UnrealEngine/5.7/Saved/Crashes/CrashReport-UE-one-pid-69367-DDF7C947C1416058628EC0854890A146/CrashReportClient.ini’.
UATHelper: Cooking (Mac): 2025-12-02 20:02:54.995 CrashReportClientEditor[70161:4792565] [UE] Ensure condition failed: false [File:./Developer/CrashDebugHelper/Private/Mac/CrashDebugHelperMac.cpp] [Line: 296]
UATHelper: Cooking (Mac):
UATHelper: Error: Cooking (Mac): LogOutputDevice: Error: === Handled ensure: ===
UATHelper: Error: Cooking (Mac): LogOutputDevice: Error:
UATHelper: Error: Cooking (Mac): LogOutputDevice: Error: Ensure condition failed: false [File:./Developer/CrashDebugHelper/Private/Mac/CrashDebugHelperMac.cpp] [Line: 296]
UATHelper: Error: Cooking (Mac): LogOutputDevice: Error:
UATHelper: Error: Cooking (Mac): LogOutputDevice: Error: Stack:
UATHelper: Error: Cooking (Mac): LogOutputDevice: Error: [Callstack] 0x00e0bd14 CrashReportClientEditor!_ZN20FCrashDebugHelperMac30CreateMinidumpDiagnosticReportERK7FString [UnknownFile])
UATHelper: Error: Cooking (Mac): LogOutputDevice: Error: [Callstack] 0x00e1b034 CrashReportClientEditor!_ZNK15FMacErrorReport14DiagnoseReportEv [UnknownFile])
UATHelper: Error: Cooking (Mac): LogOutputDevice: Error: [Callstack] 0x00e1a6d4 CrashReportClientEditor!_ZN26FCrashReportCoreUnattendedC2ER15FMacErrorReportb [UnknownFile])
UATHelper: Error: Cooking (Mac): LogOutputDevice: Error: [Callstack] 0x0138602c CrashReportClientEditor!_Z13RunUnattended15FMacErrorReportb [UnknownFile])
UATHelper: Error: Cooking (Mac): LogOutputDevice: Error: [Callstack] 0x01387024 CrashReportClientEditor!Z15SendErrorReportR15FMacErrorReport9TOptionalIbES2 [UnknownFile])
UATHelper: Error: Cooking (Mac): LogOutputDevice: Error: [Callstack] 0x013880e0 CrashReportClientEditor!_Z20RunCrashReportClientPKDs [UnknownFile])
UATHelper: Error: Cooking (Mac): LogOutputDevice: Error: [Callstack] 0x0138c624 CrashReportClientEditor!-[UEAppDelegate runGameThread:] [UnknownFile])
UATHelper: Error: Cooking (Mac): LogOutputDevice: Error: [Callstack] 0x0094398c CrashReportClientEditor!-[FCocoaGameThread main] [UnknownFile])
UATHelper: Error: Cooking (Mac): LogOutputDevice: Error: [Callstack] 0x85cc97a0 Foundation!NSThread__start [UnknownFile])
UATHelper: Error: Cooking (Mac): LogOutputDevice: Error: [Callstack] 0x84419c08 libsystem_pthread.dylib!_pthread_start [UnknownFile])
UATHelper: Error: Cooking (Mac): LogOutputDevice: Error: [Callstack] 0x84414ba8 libsystem_pthread.dylib!thread_start [UnknownFile])
UATHelper: Error: Cooking (Mac): LogOutputDevice: Error:
UATHelper: Cooking (Mac): LogAnalytics: Display: [CrashReporter.Release] AnalyticsET::EndSession
UATHelper: Cooking (Mac): Took 321,18s to run UnrealEditor, ExitCode=1
UATHelper: Error: Cooking (Mac): Cook failed.

5

random landscape sections get displaced upwards as camera approaches (since 5.7.0, 5.7.1, unstable)

Screenshot 2025-12-03 at 13.22.53
Screenshot 2025-12-03 at 13.22.531624×1756 313 KB

6

Texture corruption as well as landscape corruption happens even with streaming turned off if that helps anyone…

7

Since 5.7.0, 5.7.1 - simple camera movement in editor (and packaged build too) kills WindowServer, particularly often observable in mesh LOD coloration view mode

8

I managed to reproduce an RHI crash that visually looked exactly like the one that lead to death of WindowServer but this time WindowServer survived and I got something in log which might be relevant

LogOutputDevice: Warning:

Script Stack (0 frames) :

2025-12-11 03:06:26.559 one[2628:43039] [UE] Ensure condition failed: Binding.Length >= MinFragmentBufferSizes[Index] [File:./Runtime/Apple/MetalRHI/Private/MetalStateCache.cpp] [Line: 2570]

LogOutputDevice: Error: === Handled ensure: ===
LogOutputDevice: Error:
LogOutputDevice: Error: Ensure condition failed: Binding.Length >= MinFragmentBufferSizes[Index] [File:./Runtime/Apple/MetalRHI/Private/MetalStateCache.cpp] [Line: 2570]
LogOutputDevice: Error:
LogOutputDevice: Error: Stack:
LogOutputDevice: Error: [Callstack] 0x07eaf800 one!FMetalStateCache::SetRenderPipelineState(FMetalCommandEncoder&) [UnknownFile])
LogOutputDevice: Error: [Callstack] 0x07e622b0 one!FMetalRHICommandContext::PrepareToRender(unsigned int) [UnknownFile])
LogOutputDevice: Error: [Callstack] 0x07e63e3c one!FMetalRHICommandContext::RHIDrawIndexedPrimitive(FRHIBuffer*, int, unsigned int, unsigned int, unsigned int, unsigned int, unsigned int) [UnknownFile])
LogOutputDevice: Error: [Callstack] 0x0270a538 one!FRHICommand<FRHICommandDrawIndexedPrimitive, FRHICommandDrawIndexedPrimitiveString1841>::ExecuteAndDestruct(FRHICommandListBase&) [UnknownFile])
LogOutputDevice: Error: [Callstack] 0x02656bf8 one!FRHICommandListBase::Execute() [UnknownFile])
LogOutputDevice: Error: [Callstack] 0x02659578 one!FRHICommandListExecutor::FTranslateState::Translate(FRHICommandListBase*) [UnknownFile])
LogOutputDevice: Error: [Callstack] 0x0268e900 one!UE::Core::Private::Function::TFunctionRefCaller<FRHICommandListExecutor::FSubmitState::Dispatch(FRHICommandListBase*)::$_0, void>::Call(void*) [UnknownFile])
LogOutputDevice: Error: [Callstack] 0x02657730 one!FRHICommandListExecutor::FTaskPipe::Execute(FRHICommandListExecutor::FTaskPipe::FTask*, TRefCountPtr const&) const [UnknownFile])
LogOutputDevice: Error: [Callstack] 0x011ee5f8 one!TGraphTask<TFunctionGraphTaskImpl<void (ENamedThreads::Type, TRefCountPtr const&), (ESubsequentsMode::Type)0>>::ExecuteTask() [UnknownFile])
LogOutputDevice: Error: [Callstack] 0x00b95c7c one!UE::Tasks::Private::FTaskBase::TryExecuteTask() [UnknownFile])
LogOutputDevice: Error: [Callstack] 0x00b98a70 one!LowLevelTasks::TTaskDelegate<LowLevelTasks::FTask* (bool), 112u>::TTaskDelegateImpl<void LowLevelTasks::FTask::Init<UE::Tasks::Private::FTaskBase::Init(char16_t const*, LowLevelTasks::ETaskPriority, UE::Tasks::EExtendedTaskPriority, UE::Tasks::ETaskFlags)::‘lambda’()>(char16_t const*, LowLevelTasks::ETaskPriority, UE::Tasks::Private::FTaskBase::Init(char16_t const*, LowLevelTasks::ETaskPriority, UE::Tasks::EExtendedTaskPriority, UE::Tasks::ETaskFlags)::‘lambda’()&&, LowLevelTasks::ETaskFlags)::‘lambda’(bool), false>::CallAndMove(LowLevelTasks::TTaskDelegate<LowLevelTasks::FTask* (bool), 112u>&, void*, unsigned int, bool) [UnknownFile])
LogOutputDevice: Error: [Callstack] 0x00b91634 one!LowLevelTasks::FTask::ExecuteTask() [UnknownFile])
LogOutputDevice: Error: [Callstack] 0x00b727e4 one!LowLevelTasks::FScheduler::ExecuteTask(LowLevelTasks::FTask*) [UnknownFile])
LogOutputDevice: Error: [Callstack] 0x00b7449c one!LowLevelTasks::FScheduler::WorkerLoop(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::TLocalQueueRegistry<1024u, 1024u>::TLocalQueue*, unsigned int, bool) [UnknownFile])
LogOutputDevice: Error: [Callstack] 0x00b74de8 one!LowLevelTasks::FScheduler::WorkerMain(LowLevelTasks::Private::FWaitEvent*, LowLevelTasks::Private::TLocalQueueRegistry<1024u, 1024u>::TLocalQueue*, unsigned int, bool) [UnknownFile])
LogOutputDevice: Error: [Callstack] 0x00e0bbf8 one!FThreadImpl::Run() [UnknownFile])
LogOutputDevice: Error: [Callstack] 0x00dccd38 one!FRunnableThreadPThread::Run() [UnknownFile])
LogOutputDevice: Error: [Callstack] 0x00d46430 one!FRunnableThreadPThread::_ThreadProc(void*) [UnknownFile])
LogOutputDevice: Error: [Callstack] 0x9e8b5c08 libsystem_pthread.dylib!_pthread_start() [UnknownFile])
LogOutputDevice: Error: [Callstack] 0x9e8b0ba8 libsystem_pthread.dylib!thread_start() [UnknownFile])
LogOutputDevice: Error:
2025-12-11 03:06:27.387 one[2628:43039] [UE] Additional Crash Context (Key=“Breadcrumbs_Parallel_0”, Value="Breadcrumbs ‘Parallel’

  • ParallelDraw (Index: 2, Num: 4)
  • BasePass
  • Scene
  • RenderGraphExecute - /ViewFamilies
  • SceneRender - ViewFamilies
  • Frame 36808
    ")
    LogRHI: Error: Breadcrumbs ‘Parallel’
  • ParallelDraw (Index: 2, Num: 4)
  • BasePass
  • Scene
  • RenderGraphExecute - /ViewFamilies
  • SceneRender - ViewFamilies
  • Frame 36808