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[Crash] Editor CTDs when editing function parameters

I have a crash bug when editing blueprint function parameters:

1) Create function. 2) Open the function and create three or more new input variables (no need to edit type or name). 3) Attempt to create an output variable.

Edit: This may be related to macros. Before step 2, adding a macro to the function (but not hooking it up) seems to dramatically increase the likelihood of a crash. For the record, I'm currently replacing some macros with functions, so I'm copying their parameter lists.

Editor will crash to desktop (CTD) with the following call stack:

FBlueprintGraphActionDetails::OnAddNewOutputClicked | blueprintdetailscustomization.cpp:L3019 TBaseSPMethodDelegateInstance_RetVal_NoParams::Execute | delegateinstancesimpl.inl:L223 TBaseDelegate_RetVal_NoParams::Execute | delegatesignatureimpl.inl:L996 SButton::OnMouseButtonUp | sbutton.cpp:L194 FSlateApplication::ProcessMouseButtonUpMessage | slateapplication.cpp:L3342 FSlateApplication::OnMouseUp | slateapplication.cpp:L3310 FWindowsApplication::ProcessDeferredMessage | windowsapplication.cpp:L885 FWindowsApplication::DeferMessage | windowsapplication.cpp:L1140 FWindowsApplication::ProcessMessage | windowsapplication.cpp:L336 FWindowsApplication::AppWndProc | windowsapplication.cpp:L274 WinPumpMessages | windowsplatformmisc.cpp:L566 FWindowsPlatformMisc::PumpMessages | windowsplatformmisc.cpp:L594 FEngineLoop::Tick | launchengineloop.cpp:L1927 GuardedMain | launch.cpp:L133 GuardedMainWrapper | launchwindows.cpp:L118 WinMain | launchwindows.cpp:L183 __tmainCRTStartup | crtexe.c:L528

Product Version: Not Selected
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asked Mar 11 '14 at 02:53 AM in Blueprint Scripting

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Hi Luke,

I have tested in Beta 6, and I have not yet been able to reproduce this crash. Based on your information, I have tried with the following steps:

  1. Create a new Actor Blueprint

  2. In the Blueprint, create a new Function

  3. Also create a new Macro

  4. Open the Function, drag in the Macro

  5. Select the Function, add 3 new Inputs

  6. Add a new Output

At this point you suggest that you crash, but I have had no issue, even after compiling.

Is your crash occurring in a new Blueprint (like my repro steps)? Or does it only occur in a particular pre-existing blueprint? Is the Blueprint being used in the level or referenced by anything else?

Any information you can provide regarding specific repro steps or blueprint setup would be appreciated.


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answered Mar 11 '14 at 02:53 AM

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