Description

Splitting Transform in Collapsed Graph Crashes UE4. When this is done the editor crashes and that actor can no longer be opened without causing a crash.

Steps to Reproduce
  1. Open attached Project
  2. Open Crash_Actor_BP
  3. Open construction script
  4. Open collapsed node
  5. Delete reroute node
  6. Split Output Pin
  7. Compile the BP

Expected: BP should compile with no issue

Results: Editor crashes and actor can no longer be opened without causing the editor to crash

Callstack

UE4Editor_Engine!UEdGraphNode::BreakAllNodeLinks() edgraphnode.cpp:163
UE4Editor_KismetCompiler!FKismetCompilerContext::PruneIsolatedNodes() kismetcompiler.cpp:1272
UE4Editor_KismetCompiler!FKismetCompilerContext::ExpansionStep() kismetcompiler.cpp:2675
UE4Editor_KismetCompiler!FKismetCompilerContext::ProcessOneFunctionGraph() kismetcompiler.cpp:3295
UE4Editor_KismetCompiler!FKismetCompilerContext::CreateFunctionList() kismetcompiler.cpp:3384
UE4Editor_KismetCompiler!FKismetCompilerContext::Compile() kismetcompiler.cpp:3632
UE4Editor_KismetCompiler!FKismet2CompilerModule::CompileBlueprintInner() kismetcompilermodule.cpp:100
UE4Editor_KismetCompiler!FKismet2CompilerModule::CompileBlueprint() kismetcompilermodule.cpp:216
UE4Editor_UnrealEd!FKismetEditorUtilities::CompileBlueprint() kismet2.cpp:784
UE4Editor_Kismet!FBlueprintEditor::Compile() blueprinteditor.cpp:3202
UE4Editor_Kismet!TBaseSPMethodDelegateInstance<0,FBlueprintEditor,0,TTypeWrapper<void> __cdecl() delegateinstancesimpl.h:318
UE4Editor_Kismet!TBaseSPMethodDelegateInstance<0,FBlueprintEditor,0,void __cdecl() delegateinstancesimpl.h:424
UE4Editor_Slate!FUICommandList::ExecuteAction() uicommandlist.cpp:92
UE4Editor_Slate!SToolBarButtonBlock::OnClicked() stoolbarbuttonblock.cpp:300
UE4Editor_Slate!TMemberFunctionCaller<SToolBarButtonBlock,FReply() delegateinstanceinterface.h:161
UE4Editor_Slate!TTupleImpl<TIntegerSequence<unsigned int> >::ApplyAfter<TMemberFunctionCaller<SToolBarButtonBlock,FReply() tuple.h:116
UE4Editor_Slate!TBaseSPMethodDelegateInstance<0,SToolBarButtonBlock,0,FReply __cdecl() delegateinstancesimpl.h:318
UE4Editor_Slate!TBaseDelegate<FReply>::Execute() delegatesignatureimpl.inl:522
UE4Editor_Slate!SButton::OnMouseButtonUp() sbutton.cpp:275
UE4Editor_Slate!<lambda_8d0e9a1da76abd0a756a3a9d775f5ed1>::operator() slateapplication.cpp:5010
UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FToLeafmostPolicy,FPointerEvent,<lambda_8d0e9a1da76abd0a756a3a9d775f5ed1> >() slateapplication.cpp:215
UE4Editor_Slate!FSlateApplication::RoutePointerUpEvent() slateapplication.cpp:4999
UE4Editor_Slate!FSlateApplication::ProcessMouseButtonUpEvent() slateapplication.cpp:5462
UE4Editor_Slate!FSlateApplication::OnMouseUp() slateapplication.cpp:5439
UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() windowsapplication.cpp:1652
UE4Editor_Core!FWindowsApplication::DeferMessage() windowsapplication.cpp:2071
UE4Editor_Core!FWindowsApplication::ProcessMessage() windowsapplication.cpp:814
UE4Editor_Core!FWindowsApplication::AppWndProc() windowsapplication.cpp:678
user32!<Unknown>
user32!<Unknown>
UE4Editor_Core!FWindowsPlatformMisc::PumpMessages() windowsplatformmisc.cpp:951
UE4Editor!FEngineLoop::Tick() launchengineloop.cpp:2811
UE4Editor!GuardedMain() launch.cpp:152
UE4Editor!GuardedMainWrapper() launchwindows.cpp:126
UE4Editor!WinMain() launchwindows.cpp:202
UE4Editor!__scrt_common_main_seh() exe_common.inl:264
kernel32!<Unknown>
ntdll!<Unknown>

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Fixed
ComponentUE - Gameplay - Blueprint
Affects Versions4.13.24.14.3
Target Fix4.16
Fix Commit3301424
Main Commit3358685
CreatedFeb 10, 2017
ResolvedFeb 14, 2017
UpdatedApr 27, 2018