Hitting S while Alt + Dragging a BSP and then Stopping PIE will crash the editor.
Reproduced in 4.7.1 binary and Main (//depot/UE4/Promotable-CL-2455917)
Crash Report:
[Link Removed]
Call Stack:
<unknown module>! KERNELBASE!RaiseException() <unknown module>! UE4Editor_Core!FOutputDeviceWindowsError::Serialize() <unknown module>! UE4Editor_Core!FMsg::Logf__VA() <unknown module>! UE4Editor_MessageLog!FMessageLogListingModel::AddMessageInternal() <unknown module>! UE4Editor_MessageLog!FMessageLogListingModel::AddMessages() <unknown module>! UE4Editor_Core!FMessageLog::Flush() <unknown module>! UE4Editor_Core!FMessageLog::~FMessageLog() <unknown module>! UE4Editor_UnrealEd!UEditorEngine::EndPlayMap() <unknown module>! UE4Editor_UnrealEd!UEditorEngine::Tick() <unknown module>! UE4Editor_UnrealEd!UUnrealEdEngine::Tick() <unknown module>! UE4Editor!FEngineLoop::Tick() <unknown module>! UE4Editor!GuardedMain() <unknown module>! UE4Editor!GuardedMainWrapper() <unknown module>! UE4Editor!WinMain() <unknown module>! UE4Editor!__tmainCRTStartup()
NOTE: These steps no longer reproduce the issue in 4.8, however the crash is still occurring in the wild. Need new repro steps.
1. Open any project
2. Drag a BSP box into the level
3. Alt + Drag the box to duplicate it
4. While still holding Alt and the LMB, press the S key
5. Stop PIE
Result:
Crash
Head over to the existing Questions & Answers thread and let us know what's up.