Unreal Engine Issues and Bug Tracker (UE-17746)

Description

In the Material Editor, if all Live Previews are turned off, copying and pasting a Material Layer Blend Node will crash when the tool tip is being processed.

Also Reproduced in Main Promotable-CL-2605107

[Link Removed]

Steps to Reproduce

Open QAGame Editor
Open or Create A Material
Disable Live Preview, Live Nodes, and Live Update
Add any Material Layer Blend Node
Copy and Paste added node
Hover over pasted node (to trigger tooltip) - NOTE: This may take a moment, no more than a few seconds.

RESULTS: CRASH

EXPECTED: NO CRASH

Callstack

Fatal error! Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x00000108 UE4Editor-Engine.dll!ConvertToMultilineToolTip()

{0x000007fec9c5c850}

+ 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-Engine.dll!UMaterialExpressionMaterialFunctionCall::GetConnectorToolTip()

{0x000007fec9c79af9}

+ 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-UnrealEd.dll!UMaterialGraphNode::GetPinHoverText()

{0x000007fee4a4bca2}

+ 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-GraphEditor.dll!SGraphPin::GetTooltipText()

{0x000007fee8abe549}

+ 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-GraphEditor.dll!TMemberFunctionCaller<SGraphPin,FText (__cdecl SGraphPin::*)(void)const __ptr64>::operator()<>()

{0x000007fee893f500}

+ 15 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-GraphEditor.dll!TTupleImpl<TIntegerSequence<> >::ApplyAfter_ExplicitReturnType<FText,TMemberFunctionCaller<SGraphPin,FText (__cdecl SGraphPin::*)(void)const __ptr64> >()

{0x000007fee8943789}

+ 19 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-GraphEditor.dll!TBaseSPMethodDelegateInstance<1,SGraphPin,0,FText __cdecl(void)>::Execute()

{0x000007fee8a80e89}

+ 36 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-Slate.dll!TBaseDelegate<FText>::Execute()

{0x000007feea682a9a}

+ 6 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-Slate.dll!TAttribute<FText>::Get()

{0x000007feea68afa8}

+ 14 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-Slate.dll!SToolTip::IsEmpty()

{0x000007feea780bf2}

+ 30 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-Slate.dll!FSlateApplication::UpdateToolTip()

{0x000007feea6eeb81}

+ 20 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-Slate.dll!FSlateApplication::ProcessMouseMoveEvent()

{0x000007feea6c8ad8}

+ 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-Slate.dll!FSlateApplication::OnMouseMove()

{0x000007feea6b5b51}

+ 17 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-Core.dll!FWindowsApplication::ProcessDeferredMessage()

{0x000007feeae5d131}

+ 10 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-Core.dll!FWindowsApplication::DeferMessage()

{0x000007feeae445c1}

+ 74 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-Core.dll!FWindowsApplication::ProcessMessage()

{0x000007feeae5e99f}

+ 44 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor-Core.dll!FWindowsApplication::AppWndProc()

{0x000007feeae3e1aa}

+ 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou USER32.dll

{0x0000000077269bd1}

+ 0 bytes USER32.dll

{0x00000000772698da}

+ 0 bytes UE4Editor-Core.dll!FWindowsPlatformMisc::PumpMessages()

{0x000007feeae5fd56}

+ 48 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor.exe!FEngineLoop::Tick()

{0x000000013f4e3c7a}

+ 8 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor.exe!GuardedMain()

{0x000000013f4d49cc}

+ 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor.exe!GuardedMainWrapper()

{0x000000013f4d4a4a}

+ 5 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor.exe!WinMain()

{0x000000013f4e65c9}

+ 17 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\sou UE4Editor.exe!__tmainCRTStartup()

{0x000000013f4e75d9}

+ 21 bytes [f:\dd\vctools\crt\crtw32\dllstuff\crtexe.c:618] kernel32.dll

{0x00000000773659ed}

+ 0 bytes ntdll.dll

{0x000000007749c541} + 0 bytes ntdll.dll {0x000000007749c541}

+ 0 bytes

Community References

Engine crashes when trying to duplicate a material function node

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Fixed

Component	Tools
Affects Versions	4.8, 4.8.1, 4.9
Target Fix	4.9

Fix Commit	2607678

Created	Jun 25, 2015
Resolved	Jul 1, 2015
Updated	Apr 27, 2018

UE-17746

Copy, Paste and Hover a Material Layer Blend Node causes Crash

Copy, Paste and Hover a Material Layer Blend Node causes Crash

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