Description

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]
Steps to Reproduce

repro steps currently unknown

Callstack
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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Unresolved
ComponentRendering
Affects Versions4.154.16
Target Fix4.25
CreatedJul 27, 2017
UpdatedOct 28, 2019