This is a common crash occurring on Mac in 4.15 and 4.16. Users have not provided any additional descriptions.
Callstack from Log
Assertion failed: Assertion failed: Bitmap.Num() == x * y [File:/Users/build/Build/++UE4+Release-4.16+Compile/Sync/Engine/Source/Runtime/Engine/Private/HighResScreenshot.cpp] [Line: 221] LogCrashTracker: LogMac: === Critical error: === SIGSEGV: invalid attempt to access memory at address 0x3 FGenericPlatformMisc::RaiseException(unsigned int) Address = 0x3d5c00b (filename not found) [in UE4Editor-Core.dylib] FOutputDeviceMacError::Serialize(wchar_t const*, ELogVerbosity::Type, FName const&) Address = 0x3f57a2f (filename not found) [in UE4Editor-Core.dylib] FOutputDevice::Logf(wchar_t const*, ...) Address = 0x40386cd (filename not found) [in UE4Editor-Core.dylib] FDebug::AssertFailed(char const*, char const*, int, wchar_t const*, ...) Address = 0x3f9e93e (filename not found) [in UE4Editor-Core.dylib] bool FHighResScreenshotConfig::SaveImage<FLinearColor>(FString const&, TArray<FLinearColor, FDefaultAllocator> const&, FIntPoint const&, FString*) const Address = 0x64e7eab (filename not found) [in UE4Editor-Engine.dylib] TAsyncBufferWrite<FLinearColor>::operator()() Address = 0x147182ff (filename not found) [in UE4Editor-Renderer.dylib] TAsyncQueuedWork<void>::DoThreadedWork() Address = 0x147174b8 (filename not found) [in UE4Editor-Renderer.dylib] FQueuedThread::Run() Address = 0x3e13728 (filename not found) [in UE4Editor-Core.dylib] FRunnableThreadPThread::Run() Address = 0x3ddd7f0 (filename not found) [in UE4Editor-Core.dylib] FRunnableThreadPThread::_ThreadProc(void*) Address = 0x3d97b30 (filename not found) [in UE4Editor-Core.dylib] _pthread_body() Address = 0xcc97093b (filename not found) [in libsystem_pthread.dylib] _pthread_body() Address = 0xcc970887 (filename not found) [in libsystem_pthread.dylib] thread_start() Address = 0xcc97008d (filename not found) [in libsystem_pthread.dylib]
repro steps currently unknown
UE4Editor-Engine.dylib!bool FHighResScreenshotConfig::SaveImage<FLinearColor>() UE4Editor-Renderer.dylib!TAsyncBufferWrite<FLinearColor>::operator()() UE4Editor-Renderer.dylib!TAsyncQueuedWork<void>::DoThreadedWork() UE4Editor-Core.dylib!FQueuedThread::Run() UE4Editor-Core.dylib!FRunnableThreadPThread::Run() UE4Editor-Core.dylib!FRunnableThreadPThread::_ThreadProc() libsystem_pthread.dylib!<Unknown> libsystem_pthread.dylib!<Unknown> libsystem_pthread.dylib!<Unknown>
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There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-47765 in the post.
| 0 |
| Component | UE - Graphics Features |
|---|---|
| Affects Versions | 4.15, 4.16 |
| Created | Jul 27, 2017 |
|---|---|
| Resolved | Aug 18, 2021 |
| Updated | Aug 18, 2021 |