This is a common crash occurring for Mac users in the 4.16 release. It appears to occur during editor startup. The below details are taken from user log files.
LogFileManager:Error: Requested read of 1339384636 bytes when 97027491 bytes remain (file=/Users/***/Library/Application Support/Epic/UnrealEngine/4.16/DerivedDataCache/Boot.ddc, size=147118843) LogMac:Error: appError called: Assertion failed: Assertion failed: A.ArrayNum >= 0 [File:Runtime/Core/Public/Containers/Array.h] [Line: 1098] LogMac: === Critical error: === SIGSEGV: invalid attempt to access memory at address 0x3 LogMac: FGenericPlatformMisc::RaiseException(unsigned int) Address = 0x1aeff1b (filename not found) [in UE4Editor-Core.dylib] FOutputDeviceMacError::Serialize(wchar_t const*, ELogVerbosity::Type, FName const&) Address = 0x1cebd7f (filename not found) [in UE4Editor-Core.dylib] FOutputDevice::Logf(wchar_t const*, ...) Address = 0x1dcc88d (filename not found) [in UE4Editor-Core.dylib] FDebug::AssertFailed(char const*, char const*, int, wchar_t const*, ...) Address = 0x1d32afe (filename not found) [in UE4Editor-Core.dylib] operator<<(FArchive&, TArray<unsigned char, FDefaultAllocator>&) Address = 0x1a21e7c2 (filename not found) [in UE4Editor-DerivedDataCache.dylib] FMemoryDerivedDataBackend::LoadCache(wchar_t const*) Address = 0x1a21eebe (filename not found) [in UE4Editor-DerivedDataCache.dylib] FDerivedDataBackendGraph::ParseBootCache(wchar_t const*, wchar_t const*, FString&) Address = 0x1a22dbd8 (filename not found) [in UE4Editor-DerivedDataCache.dylib] FDerivedDataBackendGraph::ParseNode(wchar_t const*, FString const&, wchar_t const*, TMap<FString, FDerivedDataBackendInterface*, FDefaultSetAllocator, TDefaultMapHashableKeyFuncs<FString, FDerivedDataBackendInterface*, false> >&) Address = 0x1a22a38a (filename not found) [in UE4Editor-DerivedDataCache.dylib] ...more in logs...
User Descriptions
Repro steps currently unknown. May be due to running out of memory.
SEGV_MAPERR at 0x3 UE4Editor-DerivedDataCache.dylib!operator<<() UE4Editor-DerivedDataCache.dylib!FMemoryDerivedDataBackend::LoadCache() UE4Editor-DerivedDataCache.dylib!FDerivedDataBackendGraph::ParseBootCache() UE4Editor-DerivedDataCache.dylib!FDerivedDataBackendGraph::ParseNode() UE4Editor-DerivedDataCache.dylib!FDerivedDataBackendGraph::ParseHierarchicalCache() UE4Editor-DerivedDataCache.dylib!FDerivedDataBackendGraph::ParseNode() UE4Editor-DerivedDataCache.dylib!FDerivedDataBackendGraph::ParseAsyncPut() UE4Editor-DerivedDataCache.dylib!FDerivedDataBackendGraph::ParseNode() UE4Editor-DerivedDataCache.dylib!FDerivedDataBackendGraph::ParseKeyLength() UE4Editor-DerivedDataCache.dylib!FDerivedDataBackendGraph::ParseNode() UE4Editor-DerivedDataCache.dylib!FDerivedDataBackendGraph::FDerivedDataBackendGraph() UE4Editor-DerivedDataCache.dylib!FDerivedDataCache::FDerivedDataCache() UE4Editor-DerivedDataCache.dylib!InternalSingleton() UE4Editor-DerivedDataCache.dylib!FDerivedDataCacheModule::GetDDC() UE4Editor-DerivedDataCache.dylib!FDerivedDataCacheModule::StartupModule() UE4Editor-Core.dylib!FModuleManager::LoadModuleWithFailureReason() UE4Editor-Core.dylib!FModuleManager::LoadModule() UE4Editor-Core.dylib!IDerivedDataCacheModule* FModuleManager::LoadModulePtr<IDerivedDataCacheModule>() UE4Editor-Core.dylib!GetDerivedDataCache() UE4Editor-Core.dylib!GetDerivedDataCacheRef() UE4Editor-Engine.dylib!CompileGlobalShaderMap() UE4Editor!FEngineLoop::PreInit() UE4Editor!GuardedMain() UE4Editor!<Unknown> UE4Editor-Core.dylib!<Unknown> Foundation!Unknown() libsystem_pthread.dylib!<Unknown> libsystem_pthread.dylib!<Unknown> libsystem_pthread.dylib!<Unknown>
I am not able to find world outliner how to enable it?
Hey, why do i get this when i snap two similar meshes together?
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There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-46035 in the post.
| 1 |
| Component | UE - Foundation - Core |
|---|---|
| Affects Versions | 4.16, 4.16.1 |
| Target Fix | 4.17.2 |
| Created | Jun 14, 2017 |
|---|---|
| Resolved | Aug 17, 2017 |
| Updated | Jan 18, 2019 |