This is a trending Mac crash in 4.17.0 that has also occurred with some frequency since at least 4.14.
I have not been able to identify any matching callstack occurring on Windows, although it does share some similarity to an older import crash that was fixed, [Link Removed].
User Descriptions
Callstack from Log
LogUObjectAllocator: 8023664 out of 0 bytes used by permanent object pool. LogUObjectArray: CloseDisregardForGC: 0/0 objects in disregard for GC pool LogMac: === Critical error: === SIGSEGV: invalid attempt to access memory at address 0x0 LogMac: FTextHistory::Rebuild(TSharedRef<FString, (ESPMode)1>) Address = 0x1396c16 (filename not found) [in UE4Editor-Core.dylib] FText::Rebuild() const Address = 0x13965f8 (filename not found) [in UE4Editor-Core.dylib] FText::ToString() const Address = 0x13547be (filename not found) [in UE4Editor-Core.dylib] -[UE4SplashView drawRect:] Address = 0x1463468 (filename not found) [in UE4Editor-Core.dylib] -[NSView _drawRect:clip:] Address = 0x74946f99 (filename not found) [in AppKit] -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:] Address = 0x74945a93 (filename not found) [in AppKit] -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:] Address = 0x749456d1 (filename not found) [in AppKit] -[NSView _displayRectIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:] Address = 0x749426d8 (filename not found) [in AppKit] -[NSView displayIfNeeded] Address = 0x7493dfca (filename not found) [in AppKit] -[NSWindow displayIfNeeded] Address = 0x7493d8db (filename not found) [in AppKit] ___NSWindowGetDisplayCycleObserver_block_invoke.6228() Address = 0x7509dcb4 (filename not found) [in AppKit] __37+[NSDisplayCycle currentDisplayCycle]_block_invoke Address = 0x7493d3b9 (filename not found) [in AppKit] CA::Transaction::run_commit_handlers(CATransactionPhase) Address = 0x7c824d06 (filename not found) [in QuartzCore] CA::Context::commit_transaction(CA::Transaction*) Address = 0x7c92e8bc (filename not found) [in QuartzCore] CA::Transaction::commit() Address = 0x7c8237e1 (filename not found) [in QuartzCore] __37+[NSDisplayCycle currentDisplayCycle]_block_invoke.31 Address = 0x74c208b1 (filename not found) [in AppKit] __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__() Address = 0x76d14d37 (filename not found) [in CoreFoundation] __CFRunLoopDoObservers() Address = 0x76d14ca7 (filename not found) [in CoreFoundation] __CFRunLoopRun() Address = 0x76cf56d9 (filename not found) [in CoreFoundation] CFRunLoopRunSpecific() Address = 0x76cf5114 (filename not found) [in CoreFoundation] RunCurrentEventLoopInMode() Address = 0x76255ebc (filename not found) [in HIToolbox] ReceiveNextEventCommon() Address = 0x76255cf1 (filename not found) [in HIToolbox] _BlockUntilNextEventMatchingListInModeWithFilter() Address = 0x76255b26 (filename not found) [in HIToolbox] _DPSNextEvent() Address = 0x747eea54 (filename not found) [in AppKit] -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] Address = 0x74f6a7ee (filename not found) [in AppKit] -[NSApplication run] Address = 0x747e33db (filename not found) [in AppKit] tchar_main(int, wchar_t**) Address = 0x11560f3 (filename not found) [in UE4Editor] main() Address = 0x1155979 (filename not found) [in UE4Editor] start() Address = 0x8c4a4235 (filename not found) [in libdyld.dylib]
repro steps currently unknown
UE4Editor-Core.dylib!FTextHistory::Rebuild(TSharedRef<FString,() UE4Editor-Core.dylib!FText::Rebuild() UE4Editor-Core.dylib!FText::ToString() UE4Editor-Core.dylib!<Unknown> AppKit!<Unknown> AppKit!<Unknown> AppKit!<Unknown> AppKit!<Unknown> AppKit!<Unknown> AppKit!<Unknown> AppKit!<Unknown> AppKit!<Unknown> QuartzCore!CA::Transaction::run_commit_handlers() QuartzCore!CA::Context::commit_transaction() QuartzCore!CA::Transaction::commit() AppKit!<Unknown> CoreFoundation!Unknown() CoreFoundation!Unknown() CoreFoundation!Unknown() CoreFoundation!Unknown() HIToolbox!<Unknown> HIToolbox!<Unknown> HIToolbox!<Unknown> AppKit!<Unknown> AppKit!-[NSApplication() AppKit!<Unknown> UE4Editor!tchar_main() UE4Editor!<Unknown> libdyld.dylib!<Unknown>
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-48475 in the post.