This is not a regression. This also occurs dating back to 4.15 and 4.14.
The editor crashes on this check in FLevelEditorActionCallbacks::Paste_CanExecute() when updating the Edit menu state:
check(GEditor->GetSelectedActorCount() == 1);
GEditor->GetSelectedActorCount() is 2
Mac:
Expected Result: the sphere component is added back the the stairs mesh
Actual Result: the editor crashes on the redo
Windows:
Expected Result: the Edit menu should open
Actual Result: the editor crashes on opening the Edit Menu
[2017.05.30-19.22.52:252][398]LogMac: === Critical error: === SIGSEGV: invalid attempt to access memory at address 0x3 [2017.05.30-19.22.52:252][398]LogMac: FGenericPlatformMisc::RaiseException(unsigned int) Address = 0x277c62b (filename not found) [in UE4Editor-Core.dylib] FOutputDeviceMacError::Serialize(wchar_t const*, ELogVerbosity::Type, FName const&) Address = 0x2977f8f (filename not found) [in UE4Editor-Core.dylib] FOutputDevice::Logf(wchar_t const*, ...) Address = 0x2a58a9d (filename not found) [in UE4Editor-Core.dylib] FDebug::AssertFailed(char const*, char const*, int, wchar_t const*, ...) Address = 0x29bed0e (filename not found) [in UE4Editor-Core.dylib] FLevelEditorActionCallbacks::Paste_CanExecute() Address = 0x1d0233f2 (filename not found) [in UE4Editor-LevelEditor.dylib] FUICommandList::CanExecuteAction(TSharedRef<FUICommandInfo const, (ESPMode)0>) const Address = 0x8cc744f (filename not found) [in UE4Editor-Slate.dylib] FSlateMacMenu::IsMenuItemEnabled(TSharedRef<FMenuEntryBlock const, (ESPMode)0> const&) Address = 0x8da1d28 (filename not found) [in UE4Editor-Slate.dylib] FSlateMacMenu::UpdateCachedState() Address = 0x8d9ef11 (filename not found) [in UE4Editor-Slate.dylib] FMacPlatformMisc::PumpMessages(bool) Address = 0x293cb79 (filename not found) [in UE4Editor-Core.dylib] FEngineLoop::Tick() Address = 0x2685b7b (filename not found) [in UE4Editor] GuardedMain(wchar_t const*) Address = 0x268de12 (filename not found) [in UE4Editor] -[UE4AppDelegate runGameThread:] Address = 0x269c01a (filename not found) [in UE4Editor] -[FCocoaGameThread main] Address = 0x2934136 (filename not found) [in UE4Editor-Core.dylib] __NSThread__start__() Address = 0xae30bbcd (filename not found) [in Foundation] _pthread_body() Address = 0xc268b9af (filename not found) [in libsystem_pthread.dylib] _pthread_body() Address = 0xc268b8fb (filename not found) [in libsystem_pthread.dylib] thread_start() Address = 0xc268b101 (filename not found) [in libsystem_pthread.dylib]
How does TextureRenderTarget2D get TArray<uint8> type data?
Why does the REMOVE method of map container remove elements have memory leaks?
UMG RichText not appear image when packaged
What is the difference between Camera and CineCamera?
What is the cause of the packaging error falling back to 'GameUserSettings' in ue5?
How do I set a material as a post-processing material?
How to delete some elements correctly when deleting an array loop?
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-45529 in the post.