This Jira was created from CrashReports submitted by the public due to the high number of occurrences. Descriptions from users are provided below.
Error message:
Assertion failed: !bIsReentrant [Link Removed] [Line: 359]
Source Context: N/A
Most recent user affected CL: 3039270
Logs:
[Link Removed]
[Link Removed]
[Link Removed]
CrashReporter User Descriptions:
1. Open an existing level in any project. Make sure it is not checked out
2. Click save on the level editor toolbar
3. The prompt for checkout dialog should open
4. type ctrl+s. it should crash
UE4Editor_UnrealEd!SaveWorld() [filehelpers.cpp:359] UE4Editor_UnrealEd!FEditorFileUtils::SaveMap() [filehelpers.cpp:2218] UE4Editor_UnrealEd!InternalSavePackage() [filehelpers.cpp:2612] UE4Editor_UnrealEd!FEditorFileUtils::PromptForCheckoutAndSave() [filehelpers.cpp:3142] UE4Editor_UnrealEd!InternalSavePackages() [filehelpers.cpp:2728] UE4Editor_UnrealEd!FEditorFileUtils::SaveDirtyPackages() [filehelpers.cpp:2842] UE4Editor_MainFrame!FMainFrameActionCallbacks::SaveAll() [mainframeactions.cpp:226] UE4Editor_MainFrame!TBaseStaticDelegateInstance<void __cdecl() [delegateinstancesimpl_variadics.inl:1021] UE4Editor_Slate!FUICommandList::ConditionalProcessCommandBindings() [uicommandlist.cpp:206] UE4Editor_Slate!FUICommandList::ProcessCommandBindings() [uicommandlist.cpp:150] UE4Editor_MainFrame!FMainFrameActionCallbacks::OnUnhandledKeyDownEvent() [mainframeactions.cpp:174] UE4Editor_MainFrame!TTupleImpl<TIntegerSequence<unsigned int> >::ApplyAfter_ExplicitReturnType<FReply,FReply() [tuple.h:128] UE4Editor_MainFrame!TBaseStaticDelegateInstance<FReply __cdecl() [delegateinstancesimpl_variadics.inl:952] UE4Editor_Slate!TBaseDelegate<FReply,FKeyEvent const & __ptr64>::Execute() [delegatesignatureimpl_variadics.inl:521] UE4Editor_Slate!FSlateApplication::ProcessKeyDownEvent() [slateapplication.cpp:4243] UE4Editor_Slate!FSlateApplication::OnKeyDown() [slateapplication.cpp:4147] UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() [windowsapplication.cpp:1345] UE4Editor_Core!FWindowsApplication::DeferMessage() [windowsapplication.cpp:1850] UE4Editor_Core!FWindowsApplication::ProcessMessage() [windowsapplication.cpp:745] UE4Editor_Core!FWindowsApplication::AppWndProc() [windowsapplication.cpp:667] user32!<Unknown> user32!<Unknown> UE4Editor_Core!FWindowsApplication::PumpMessages() [windowsapplication.cpp:1862] UE4Editor_Slate!FSlateApplication::TickPlatform() [slateapplication.cpp:1372] UE4Editor_Slate!FSlateApplication::Tick() [slateapplication.cpp:1350] UE4Editor_UnrealEd!TickSlate() [feedbackcontexteditor.cpp:346] UE4Editor_UnrealEd!FFeedbackContextEditor::ProgressReported() [feedbackcontexteditor.cpp:479] UE4Editor_Core!FFeedbackContext::UpdateUI() [feedbackcontext.cpp:34] UE4Editor_Core!FFeedbackContext::RequestUpdateUI() [feedbackcontext.cpp:24] UE4Editor_CoreUObject!UPackage::Save() [savepackage.cpp:3305] UE4Editor_UnrealEd!UEditorEngine::Save() [editorengine.cpp:3891] UE4Editor_UnrealEd!UEditorEngine::SavePackage() [editorengine.cpp:3948] UE4Editor_UnrealEd!UEditorEngine::Exec_Obj() [editorserver.cpp:4441] UE4Editor_UnrealEd!UEditorEngine::Exec() [editorserver.cpp:5535] UE4Editor_UnrealEd!UUnrealEdEngine::Exec() [unrealedsrv.cpp:744] UE4Editor_UnrealEd!SaveWorld() [filehelpers.cpp:532] UE4Editor_UnrealEd!FEditorFileUtils::SaveLevel() [filehelpers.cpp:1103] UE4Editor_UnrealEd!FEditorFileUtils::SaveCurrentLevel() [filehelpers.cpp:2915] UE4Editor_LevelEditor!TBaseStaticDelegateInstance<void __cdecl() [delegateinstancesimpl_variadics.inl:1021] UE4Editor_Slate!FUICommandList::ExecuteAction() [uicommandlist.cpp:87] UE4Editor_Slate!SToolBarButtonBlock::OnClicked() [stoolbarbuttonblock.cpp:300] UE4Editor_Slate!TMemberFunctionCaller<SToolBarButtonBlock,FReply() [delegateinstanceinterface_variadics.h:161] UE4Editor_Slate!TTupleImpl<TIntegerSequence<unsigned int> >::ApplyAfter_ExplicitReturnType<FReply,TMemberFunctionCaller<SToolBarButtonBlock,FReply() [tuple.h:128] UE4Editor_Slate!TBaseSPMethodDelegateInstance<0,SToolBarButtonBlock,0,FReply __cdecl() [delegateinstancesimpl_variadics.inl:321] UE4Editor_Slate!TBaseDelegate<FReply>::Execute() [delegatesignatureimpl_variadics.inl:521] UE4Editor_Slate!SButton::OnMouseButtonUp() [sbutton.cpp:275] UE4Editor_Slate!<lambda_8d0e9a1da76abd0a756a3a9d775f5ed1>::operator() [slateapplication.cpp:4598] UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FToLeafmostPolicy,FPointerEvent,<lambda_8d0e9a1da76abd0a756a3a9d775f5ed1> >() [slateapplication.cpp:215] UE4Editor_Slate!FSlateApplication::RoutePointerUpEvent() [slateapplication.cpp:4587] UE4Editor_Slate!FSlateApplication::ProcessMouseButtonUpEvent() [slateapplication.cpp:5041] UE4Editor_Slate!FSlateApplication::OnMouseUp() [slateapplication.cpp:5021] UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() [windowsapplication.cpp:1510] UE4Editor_Core!FWindowsApplication::DeferMessage() [windowsapplication.cpp:1850] UE4Editor_Core!FWindowsApplication::ProcessMessage() [windowsapplication.cpp:745] UE4Editor_Core!FWindowsApplication::AppWndProc() [windowsapplication.cpp:667] user32!<Unknown> user32!<Unknown> UE4Editor_Core!FWindowsPlatformMisc::PumpMessages() [windowsplatformmisc.cpp:903] UE4Editor!FEngineLoop::Tick() [launchengineloop.cpp:2729] UE4Editor!GuardedMain() [launch.cpp:148] UE4Editor!GuardedMainWrapper() [launchwindows.cpp:126] UE4Editor!WinMain() [launchwindows.cpp:200] UE4Editor!__scrt_common_main_seh() [exe_common.inl:264] kernel32!<Unknown>
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-35360 in the post.