Detailed Crash Report

Etterna v0.74.4

Crash Reason: EXCEPTION_ACCESS_VIOLATION_READ Date Uploaded: 2026-07-24 02:35:16 UTC Crash Location: 0x000001d46b3df000

Windows

  • Process PID: 18924
  • OS Version: 10.0.19041 5915
  • Architecture: amd64
  • CPU Core Count: 16
  • CPU Info: family 25 model 68 stepping 1

Modules

  • mdnsNSP.pdb
  • avformat-55.dll
  • avutil-52.dll
  • swscale-2.dll
  • avcodec-55.dll
  • Etterna.pdb
  • amdxn64.pdb
  • d3dx9_43.pdb
  • d3d9.pdb
  • glu32.pdb
  • opengl32.pdb
  • dsound.pdb
  • wdmaud.pdb
  • dinput8.pdb
  • msacm32.pdb
  • midimap.pdb
  • msacm32.pdb
  • ksuser.pdb
  • WINMMBASE.pdb
  • InputHost.pdb
  • amdihk64.dll
  • winmm.pdb
  • TextInputFramework.pdb
  • DXCore.pdb
  • MMDevAPI.pdb
  • audioses.pdb
  • version.pdb
  • ninput.pdb
  • avrt.pdb
  • propsys.pdb
  • fwpuclnt.pdb
  • WinTypes.pdb
  • dcomp.pdb
  • atidx9loader64.pdb
  • CoreUIComponents.pdb
  • CoreMessaging.pdb
  • rasadhlp.pdb
  • dhcpcsvc.pdb
  • apphelp.pdb
  • UxTheme.pdb
  • dwmapi.pdb
  • Kernel.Appcore.pdb
  • Windows.Storage.pdb
  • hid.pdb
  • dxgi.pdb
  • rsaenh.pdb
  • iphlpapi.pdb
  • dnsapi.pdb
  • mswsock.pdb
  • cryptbase.pdb
  • WLDP.pdb
  • UMPDC.pdb
  • msasn1.pdb
  • powrprof.pdb
  • ntmarta.pdb
  • cryptsp.pdb
  • devobj.pdb
  • cfgmgr32.pdb
  • bcrypt.pdb
  • crypt32.pdb
  • gdi32full.pdb
  • win32u.pdb
  • msvcp_win.pdb
  • bcryptprimitives.pdb
  • kernelbase.pdb
  • ucrtbase.pdb
  • wintrust.pdb
  • msctf.pdb
  • CLBCatQ.pdb
  • sechost.pdb
  • shcore.pdb
  • advapi32.pdb
  • kernel32.pdb
  • setupapi.pdb
  • shlwapi.pdb
  • imm32.pdb
  • ws2_32.pdb
  • msvcrt.pdb
  • combase.pdb
  • gdi32.pdb
  • shell32.pdb
  • rpcrt4.pdb
  • user32.pdb
  • nsi.pdb
  • ole32.pdb
  • oleaut32.pdb
  • ntdll.pdb

    2. Loading Code Snippet...
    3. Loading Code Snippet...
    4. Loading Code Snippet...
    5. Loading Code Snippet...
    6. Loading Code Snippet...
    7. Loading Code Snippet...
    8. Loading Code Snippet...
    9. Loading Code Snippet...
    10. Loading Code Snippet...
    11. Loading Code Snippet...
    12. Loading Code Snippet...
    13. Loading Code Snippet...
    14. Loading Code Snippet...
    15. Loading Code Snippet...
    16. Loading Code Snippet...
    17. Loading Code Snippet...
    18. Loading Code Snippet...
    19. Loading Code Snippet...
    20. Loading Code Snippet...
  20. - [KERNEL32.DLL] - BaseThreadInitThunk
  21. - [ntdll.dll] - RtlUserThreadStart
  22. - [KERNELBASE.dll] - TerminateProcessOnMemoryExhaustion
  23. - [AMDXN64.DLL] - None

  1. - [ntdll.dll] - NtWaitForMultipleObjects
  2. - [KERNELBASE.dll] - WaitForMultipleObjectsEx
  3. - [inputhost.dll] - <unknown>
  4. - [inputhost.dll] - <unknown>
  5. - [CoreMessaging.dll] - <unknown>
  6. - [inputhost.dll] - virtual void InputHost::OnInput(struct tagInputRoutingInfo const &,struct InputEventPayload const *)
  7. - [inputhost.dll] - virtual long Microsoft::BamoImpl::ConnectionIndirector::OnItemMessage(unsigned int,unsigned int,void const *,void const *,unsigned int)
  8. - [CoreMessaging.dll] - void Cn::Com::NativeExit::NoContext_EndCall
  9. - [CoreMessaging.dll] - void Microsoft::CoreUI::ICallbackMessageConversationHost$X__CallbackAdapter::OnItemMessage(unsigned int,unsigned int,void *,void *,unsigned int)
  10. - [inputhost.dll] - virtual long BamoImpl::BamoControllerNavigationManagerProxyImpl::OnMessage(void const *,unsigned int)
  11. - [inputhost.dll] - virtual long Microsoft::BamoImpl::ConnectionIndirector::OnItemMessage(unsigned int,unsigned int,void const *,void const *,unsigned int)
  12. - [CoreMessaging.dll] - void Cn::Com::NativeExit::NoContext_EndCall
  13. - [CoreMessaging.dll] - void Microsoft::CoreUI::ICallbackMessageConversationHost$X__CallbackAdapter::OnItemMessage(unsigned int,unsigned int,void *,void *,unsigned int)
  14. - [CoreMessaging.dll] - virtual void Microsoft::CoreUI::Conversations::ItemMessageDispatcher::Callback_OnMessageCore(struct Microsoft::CoreUI::Support::BufferInfo)
  15. - [CoreMessaging.dll] - struct Microsoft::CoreUI::Dispatch::WaitStatus Microsoft::CoreUI::Dispatch::WaitAdapter::Callback_WaitAny(class Microsoft::CoreUI::Dispatch::WaitController *,struct Microsoft::CoreUI::Support::Win32Handle *,unsigned int,unsigned int,struct Microsoft::CoreUI::WaitFlags,bool,unsigned int &)
  16. - [CoreMessaging.dll] - void Microsoft::CoreUI::Dispatch::Dispatcher::CancelCurrentItem
  17. - [CoreMessaging.dll] - unsigned int Microsoft::CoreUI::Messaging::MessageSessionCommon::Callback_DeliverMessageBatch(struct Microsoft::CoreUI::Messaging::MessageBufferEnumerator,uint64_t,unsigned int,unsigned int,bool,class Microsoft::CoreUI::Messaging::CrossProcessReceivePortBase *)
  18. - [CoreMessaging.dll] - struct Microsoft::CoreUI::Messaging::MessagingResults Microsoft::CoreUI::Dispatch::WaitController::Callback_DoWait(unsigned int,struct Microsoft::CoreUI::Support::Win32Handle *,unsigned int,struct Microsoft::CoreUI::WaitFlags,bool,struct Microsoft::CoreUI::Dispatch::WakeRecord &)
  19. - [CoreMessaging.dll] - void Microsoft::CoreUI::Dispatch::WaitController::Callback_DoGeneralWait(unsigned int,struct Microsoft::CoreUI::Support::Win32Handle *,unsigned int,struct Microsoft::CoreUI::WaitFlags,struct Microsoft::CoreUI::Dispatch::WakeRecord &,class Microsoft::CoreUI::Dispatch::WakeRecordHandler *,bool)
  20. - [CoreMessaging.dll] - static struct Microsoft::CoreUI::Dispatch::WakeRecord Microsoft::CoreUI::Dispatch::WakeRecord$R::New(class Microsoft::CoreUI::Dispatch::RegisteredWaitBase *,struct Microsoft::CoreUI::Dispatch::WaitStatus,struct Microsoft::CoreUI::Support::Win32Handle,unsigned int,unsigned int)
  21. - [CoreMessaging.dll] - bool Microsoft::CoreUI::Dispatch::DispatchItem::ForceWakeLevel(struct Microsoft::CoreUI::Dispatch::InternalPriority)
  22. - [CoreMessaging.dll] - bool Microsoft::CoreUI::Support::IoCompletionPort::RemoveCompletion(unsigned int,struct Microsoft::CoreUI::Support::CompletionRecord &)
  23. - [CoreMessaging.dll] - void Microsoft::CoreUI::Dispatch::Dispatcher::OnChildWakeChanged(class Microsoft::CoreUI::Dispatch::DispatchItem *,struct Microsoft::CoreUI::Dispatch::InternalPriority,struct Microsoft::CoreUI::Dispatch::InternalPriority)
  24. - [CoreMessaging.dll] - virtual void Microsoft::CoreUI::Dispatch::WaitController::Callback_OnDispatch
  25. - [CoreMessaging.dll] - struct Microsoft::CoreUI::Dispatch::WaitStatus Microsoft::CoreUI::Dispatch::WaitAdapter::Callback_WaitAny(class Microsoft::CoreUI::Dispatch::WaitController *,struct Microsoft::CoreUI::Support::Win32Handle *,unsigned int,unsigned int,struct Microsoft::CoreUI::WaitFlags,bool,unsigned int &)
  26. - [CoreMessaging.dll] - void Microsoft::CoreUI::Support::DoubleListItem__FIFO::Remove(class Microsoft::CoreUI::Support::DoubleListItem *)
  27. - [CoreMessaging.dll] - <unknown>
  28. - [CoreMessaging.dll] - struct Microsoft::CoreUI::Dispatch::Dispatcher__LoopExitState Microsoft::CoreUI::Dispatch::EventLoop::Callback_RunCoreLoop(struct Microsoft::CoreUI::Dispatch::RunMode,bool,bool &)
  29. - [CoreMessaging.dll] - class System::Object * Cn::ObjectRef<class Microsoft::CoreUI::Messaging::AlpcSendMessageAdapter>::AssignWorker(class System::Object *)
  30. - [CoreMessaging.dll] - bool Cn::Com::NativeEntry::NoContext_Prologue(struct Cn::Engine::GCHandleGlobalEntry *,void *)
  31. - [CoreMessaging.dll] - void Microsoft::CoreUI::Dispatch::EventLoop::Callback_Run(struct Microsoft::CoreUI::Dispatch::RunMode)
  32. - [CoreMessaging.dll] - void Cn::Engine::Heap::Leave(class Cn::Com::NativeEntry *,struct Cn::Engine::Heap::HeapEntry *,bool,bool)
  33. - [CoreMessaging.dll] - void Microsoft::CoreUI::Dispatch::WaitController::EnqueueUnstartedWait(class Microsoft::CoreUI::Dispatch::RegisteredWaitBase *)
  34. - [CoreMessaging.dll] - virtual void Microsoft::CoreUI::Messaging::MessageSessionCommon$R::Microsoft__CoreUI__IExportMessageSession_Impl::Run(class System::Object *)
  35. - [CoreMessaging.dll] - virtual long Microsoft::CoreUI::IExportMessageSession$X__ExportAdapter::Run
  36. - [msvcp_win.dll] - Mtx_unlock
  37. - [inputhost.dll] - void MessagingThread::ThreadProc
  38. - [inputhost.dll] - <lambda_1a34f8f1f48e0e6568a1db7e86863949>::<lambda_invoker_cdecl>
  39. - [KERNEL32.DLL] - BaseThreadInitThunk
  40. - [ntdll.dll] - RtlUserThreadStart

  1. - [ntdll.dll] - NtWaitForAlertByThreadId
  2. - [ntdll.dll] - RtlSleepConditionVariableSRW
  3. - [ntdll.dll] - RtlGetSystemTimePrecise
  4. - [KERNELBASE.dll] - SleepConditionVariableSRW
    6. Loading Code Snippet...
    7. Loading Code Snippet...
    8. Loading Code Snippet...
    9. Loading Code Snippet...
    10. Loading Code Snippet...
    11. Loading Code Snippet...
  11. - [KERNEL32.DLL] - BaseThreadInitThunk
  12. - [ntdll.dll] - RtlUserThreadStart

  1. - [ntdll.dll] - NtWaitForMultipleObjects
  2. - [KERNELBASE.dll] - WaitForMultipleObjectsEx
  3. - [AUDIOSES.DLL] - <unknown>
  4. - [wdmaud.drv] - <unknown>
  5. - [AUDIOSES.DLL] - virtual long CAudioClient::GetCurrentPadding(unsigned int *)
  6. - [KERNELBASE.dll] - InitOnceBeginInitialize
  7. - [AUDIOSES.DLL] - virtual long CAudioClientClock::GetPosition(uint64_t *,uint64_t *)
  8. - [AUDIOSES.DLL] - <unknown>
  9. - [KERNELBASE.dll] - InitOnceBeginInitialize
  10. - [KERNELBASE.dll] - WaitForSingleObjectEx
  11. - [KERNELBASE.dll] - ReleaseMutex
  12. - [wdmaud.drv] - int CRecurringJob::IsCancelled
  13. - [wdmaud.drv] - enum WORKRESULT CWorker::_DoRecurringJobs
  14. - [wdmaud.drv] - <unknown>
  15. - [wdmaud.drv] - <unknown>
  16. - [wdmaud.drv] - unsigned long CWorker::_ThreadProc

  1. - [ntdll.dll] - NtDelayExecution
  2. - [KERNELBASE.dll] - SleepEx
    4. Loading Code Snippet...
    5. Loading Code Snippet...
    6. Loading Code Snippet...
    7. Loading Code Snippet...
    8. Loading Code Snippet...
  8. - [KERNEL32.DLL] - BaseThreadInitThunk
  9. - [ntdll.dll] - RtlUserThreadStart

  1. - [ntdll.dll] - NtWaitForSingleObject
  2. - [KERNELBASE.dll] - WaitForSingleObjectEx
    4. Loading Code Snippet...
  4. - [None] - None
    6. Loading Code Snippet...
    7. Loading Code Snippet...
    8. Loading Code Snippet...
  8. - [KERNEL32.DLL] - BaseThreadInitThunk
  9. - [ntdll.dll] - RtlUserThreadStart

  1. - [ntdll.dll] - NtSignalAndWaitForSingleObject
  2. - [KERNELBASE.dll] - SignalObjectAndWait
    4. Loading Code Snippet...
    5. Loading Code Snippet...
    6. Loading Code Snippet...
    7. Loading Code Snippet...
    8. Loading Code Snippet...
  8. - [KERNEL32.DLL] - BaseThreadInitThunk
  9. - [ntdll.dll] - RtlUserThreadStart

  1. - [ntdll.dll] - NtWaitForWorkViaWorkerFactory
  2. - [ntdll.dll] - TppWorkerThread

  1. - [win32u.dll] - NtUserMsgWaitForMultipleObjectsEx
  2. - [USER32.dll] - unsigned long RealMsgWaitForMultipleObjectsEx(unsigned long,void * const *,unsigned long,unsigned long,unsigned long)
  3. - [DINPUT8.dll] - CEm_LL_ThreadProc
  4. - [KERNEL32.DLL] - BaseThreadInitThunk
  5. - [ntdll.dll] - RtlUserThreadStart

  1. - [ntdll.dll] - NtDelayExecution
  2. - [KERNELBASE.dll] - SleepEx
  3. - [KERNELBASE.dll] - GetSystemTimePreciseAsFileTime
    5. Loading Code Snippet...
    6. Loading Code Snippet...
    7. Loading Code Snippet...
    8. Loading Code Snippet...
    9. Loading Code Snippet...
    10. Loading Code Snippet...
  10. - [KERNEL32.DLL] - BaseThreadInitThunk
  11. - [ntdll.dll] - RtlUserThreadStart

  1. - [ntdll.dll] - NtDelayExecution
  2. - [KERNELBASE.dll] - SleepEx
  3. - [KERNELBASE.dll] - GetSystemTimePreciseAsFileTime
    5. Loading Code Snippet...
    6. Loading Code Snippet...
    7. Loading Code Snippet...
    8. Loading Code Snippet...
    9. Loading Code Snippet...
    10. Loading Code Snippet...
  10. - [KERNEL32.DLL] - BaseThreadInitThunk
  11. - [ntdll.dll] - RtlUserThreadStart

  1. - [ntdll.dll] - NtWaitForMultipleObjects
  2. - [KERNELBASE.dll] - WaitForMultipleObjectsEx

  1. - [ntdll.dll] - NtWaitForWorkViaWorkerFactory
  2. - [ntdll.dll] - TppWorkerThread

  1. - [ntdll.dll] - NtWaitForSingleObject
  2. - [KERNELBASE.dll] - WaitForSingleObjectEx
  3. - [KERNELBASE.dll] - WaitForSingleObjectEx
    5. Loading Code Snippet...
    6. Loading Code Snippet...
    7. Loading Code Snippet...
  7. - [KERNEL32.DLL] - BaseThreadInitThunk
  8. - [ntdll.dll] - RtlUserThreadStart

  1. - [ntdll.dll] - NtSignalAndWaitForSingleObject
  2. - [KERNELBASE.dll] - SignalObjectAndWait
    4. Loading Code Snippet...
  4. - [None] - None
    6. Loading Code Snippet...
    7. Loading Code Snippet...
    8. Loading Code Snippet...
    9. Loading Code Snippet...
    10. Loading Code Snippet...
    11. Loading Code Snippet...
  11. - [KERNEL32.DLL] - BaseThreadInitThunk
  12. - [ntdll.dll] - RtlUserThreadStart

  1. - [ntdll.dll] - NtWaitForAlertByThreadId
  2. - [ntdll.dll] - RtlSleepConditionVariableCS
  3. - [KERNELBASE.dll] - SleepConditionVariableCS
  4. - [AMDXN64.DLL] - None
  5. - [AMDXN64.DLL] - None
  6. - [KERNEL32.DLL] - BaseThreadInitThunk
  7. - [ntdll.dll] - RtlUserThreadStart

  1. - [ntdll.dll] - NtWaitForAlertByThreadId
  2. - [ntdll.dll] - RtlSleepConditionVariableCS
  3. - [KERNELBASE.dll] - SleepConditionVariableCS
  4. - [AMDXN64.DLL] - None
  5. - [AMDXN64.DLL] - None
  6. - [KERNEL32.DLL] - BaseThreadInitThunk
  7. - [ntdll.dll] - RtlUserThreadStart

  1. - [ntdll.dll] - NtWaitForAlertByThreadId
  2. - [ntdll.dll] - RtlSleepConditionVariableCS
  3. - [KERNELBASE.dll] - SleepConditionVariableCS
  4. - [AMDXN64.DLL] - None
  5. - [AMDXN64.DLL] - None
  6. - [KERNEL32.DLL] - BaseThreadInitThunk
  7. - [ntdll.dll] - RtlUserThreadStart

  1. - [ntdll.dll] - NtWaitForAlertByThreadId
  2. - [ntdll.dll] - RtlSleepConditionVariableCS
  3. - [ntdll.dll] - RtlSetLastWin32Error
  4. - [KERNELBASE.dll] - SleepConditionVariableCS
  5. - [AMDXN64.DLL] - None
  6. - [AMDXN64.DLL] - None
  7. - [KERNEL32.DLL] - BaseThreadInitThunk
  8. - [ntdll.dll] - RtlUserThreadStart

  1. - [ntdll.dll] - NtWaitForAlertByThreadId
  2. - [ntdll.dll] - RtlSleepConditionVariableCS
  3. - [KERNELBASE.dll] - SleepConditionVariableCS
  4. - [AMDXN64.DLL] - None
  5. - [AMDXN64.DLL] - None
  6. - [KERNEL32.DLL] - BaseThreadInitThunk
  7. - [ntdll.dll] - RtlUserThreadStart

  1. - [ntdll.dll] - NtWaitForAlertByThreadId
  2. - [ntdll.dll] - RtlSleepConditionVariableCS
  3. - [ntdll.dll] - RtlSetLastWin32Error
  4. - [KERNELBASE.dll] - SleepConditionVariableCS
  5. - [AMDXN64.DLL] - None
  6. - [AMDXN64.DLL] - None
  7. - [KERNEL32.DLL] - BaseThreadInitThunk
  8. - [ntdll.dll] - RtlUserThreadStart

  1. - [ntdll.dll] - NtWaitForAlertByThreadId
  2. - [ntdll.dll] - RtlSleepConditionVariableCS
  3. - [KERNELBASE.dll] - SleepConditionVariableCS
  4. - [AMDXN64.DLL] - None
  5. - [AMDXN64.DLL] - None
  6. - [KERNEL32.DLL] - BaseThreadInitThunk
  7. - [ntdll.dll] - RtlUserThreadStart

  1. - [ntdll.dll] - NtWaitForAlertByThreadId
  2. - [ntdll.dll] - RtlSleepConditionVariableCS
  3. - [KERNELBASE.dll] - SleepConditionVariableCS
  4. - [AMDXN64.DLL] - None
  5. - [AMDXN64.DLL] - None
  6. - [KERNEL32.DLL] - BaseThreadInitThunk
  7. - [ntdll.dll] - RtlUserThreadStart

  1. - [ntdll.dll] - NtWaitForAlertByThreadId
  2. - [ntdll.dll] - RtlSleepConditionVariableCS
  3. - [ntdll.dll] - RtlSetLastWin32Error
  4. - [KERNELBASE.dll] - SleepConditionVariableCS
  5. - [AMDXN64.DLL] - None
  6. - [AMDXN64.DLL] - None
  7. - [KERNEL32.DLL] - BaseThreadInitThunk
  8. - [ntdll.dll] - RtlUserThreadStart

  1. - [ntdll.dll] - NtWaitForAlertByThreadId
  2. - [ntdll.dll] - RtlSleepConditionVariableCS
  3. - [KERNELBASE.dll] - SleepConditionVariableCS
  4. - [AMDXN64.DLL] - None
  5. - [AMDXN64.DLL] - None
  6. - [KERNEL32.DLL] - BaseThreadInitThunk
  7. - [ntdll.dll] - RtlUserThreadStart

  1. - [ntdll.dll] - NtWaitForAlertByThreadId
  2. - [ntdll.dll] - RtlSleepConditionVariableCS
  3. - [ntdll.dll] - RtlSetLastWin32Error
  4. - [KERNELBASE.dll] - SleepConditionVariableCS
  5. - [AMDXN64.DLL] - None
  6. - [AMDXN64.DLL] - None
  7. - [KERNEL32.DLL] - BaseThreadInitThunk
  8. - [ntdll.dll] - RtlUserThreadStart

  1. - [ntdll.dll] - NtWaitForAlertByThreadId
  2. - [ntdll.dll] - RtlSleepConditionVariableCS
  3. - [KERNELBASE.dll] - SleepConditionVariableCS
  4. - [AMDXN64.DLL] - None
  5. - [AMDXN64.DLL] - None
  6. - [KERNEL32.DLL] - BaseThreadInitThunk
  7. - [ntdll.dll] - RtlUserThreadStart

  1. - [ntdll.dll] - NtWaitForAlertByThreadId
  2. - [ntdll.dll] - RtlSleepConditionVariableCS
  3. - [KERNELBASE.dll] - SleepConditionVariableCS
  4. - [AMDXN64.DLL] - None
  5. - [AMDXN64.DLL] - None
  6. - [KERNEL32.DLL] - BaseThreadInitThunk
  7. - [ntdll.dll] - RtlUserThreadStart

  1. - [ntdll.dll] - NtWaitForAlertByThreadId
  2. - [ntdll.dll] - RtlSleepConditionVariableCS
  3. - [ntdll.dll] - RtlSetLastWin32Error
  4. - [KERNELBASE.dll] - SleepConditionVariableCS
  5. - [AMDXN64.DLL] - None
  6. - [AMDXN64.DLL] - None
  7. - [KERNEL32.DLL] - BaseThreadInitThunk
  8. - [ntdll.dll] - RtlUserThreadStart

  1. - [ntdll.dll] - NtWaitForAlertByThreadId
  2. - [ntdll.dll] - RtlSleepConditionVariableCS
  3. - [KERNELBASE.dll] - SleepConditionVariableCS
  4. - [AMDXN64.DLL] - None
  5. - [AMDXN64.DLL] - None
  6. - [AMDXN64.DLL] - None
  7. - [KERNEL32.DLL] - BaseThreadInitThunk
  8. - [ntdll.dll] - RtlUserThreadStart

  1. - [win32u.dll] - NtUserMsgWaitForMultipleObjectsEx
  2. - [USER32.dll] - unsigned long RealMsgWaitForMultipleObjectsEx(unsigned long,void * const *,unsigned long,unsigned long,unsigned long)
  3. - [KERNELBASE.dll] - SetEvent
  4. - [d3d9.dll] - static unsigned long ThreadAffinitizedWorkerThread<enum ProxyWindowCommands>::WorkerThread(void *)
  5. - [KERNEL32.DLL] - BaseThreadInitThunk
  6. - [ntdll.dll] - RtlUserThreadStart

  1. - [ntdll.dll] - NtWaitForWorkViaWorkerFactory
  2. - [ntdll.dll] - TppWorkerThread