This is a Regression. Tested in //UE5/Release-5.0 CL20979098 - "None" is not an option for the parent class and the "Reset this Property" is not initially there.
Crash occurs when selecting Reset this Property to Default Value in the Class Settings of a Child Animation Blueprint.
Expected Results:
The Parent Class can't be set to 'None' and the Reset arrow isn't available on a newly created Child Blueprint, or setting it to 'None' doesn't cause a crash.
Actual Results:
Editor Crashes
Fatal error: [File:D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\Templates\Casts.cpp] [Line: 10] Cast of nullptr to AnimBlueprintGeneratedClass failed UnrealEditor-CoreUObject!CastLogError(wchar_t const *,wchar_t const *) [Casts.cpp:11] UnrealEditor-AnimGraph!FAnimBlueprintCompilerContext::FinishCompilingClass(UClass *) [AnimBlueprintCompiler.cpp:1419] UnrealEditor-KismetCompiler!FKismetCompilerContext::CompileFunctions(EInternalCompilerFlags) [KismetCompiler.cpp:4903] UnrealEditor-Kismet!FBlueprintCompilationManagerImpl::FlushCompilationQueueImpl(bool,TArray<UBlueprint *,TSizedDefaultAllocator<32> > *,TArray<UBlueprint *,TSizedDefaultAllocator<32> > *,FUObjectSerializeContext *) [BlueprintCompilationManager.cpp:1452] UnrealEditor-Kismet!FBlueprintCompilationManagerImpl::CompileSynchronouslyImpl(FBPCompileRequestInternal const &) [BlueprintCompilationManager.cpp:269] UnrealEditor-Kismet!FBlueprintCompilationManager::CompileSynchronously(FBPCompileRequest const &) [BlueprintCompilationManager.cpp:3294] UnrealEditor-UnrealEd!7ffbce020000 + b79d6e UnrealEditor-Kismet!FBlueprintEditor::Compile() [BlueprintEditor.cpp:4060] UnrealEditor-Kismet!TBaseSPMethodDelegateInstance<0,FBlueprintEditor,1,void ,FDefaultDelegateUserPolicy>::ExecuteIfSafe() [DelegateInstancesImpl.h:312] UnrealEditor-Slate!7ffbd5ea0000 + e0501 UnrealEditor-Slate!7ffbd5ea0000 + 1f0777 UnrealEditor-Slate!7ffbd5ea0000 + 1c8d44 UnrealEditor-Slate!7ffbd5ea0000 + 26ed56 UnrealEditor-Slate!7ffbd5ea0000 + 2948d3 UnrealEditor-Slate!7ffbd5ea0000 + 2aab8 UnrealEditor-Slate!7ffbd5ea0000 + fe2a UnrealEditor-Slate!7ffbd5ea0000 + 764e3 UnrealEditor-Slate!7ffbd5ea0000 + 65113 UnrealEditor-Slate!7ffbd5ea0000 + 5adec UnrealEditor-ApplicationCore!FWindowsApplication::ProcessDeferredMessage(FDeferredWindowsMessage const &) [WindowsApplication.cpp:2219] UnrealEditor-ApplicationCore!FWindowsApplication::DeferMessage(TSharedPtr<FWindowsWindow,1> &,HWND__ *,unsigned int,unsigned __int64,__int64,int,int,unsigned int) [WindowsApplication.cpp:2726] UnrealEditor-ApplicationCore!FWindowsApplication::ProcessMessage(HWND__ *,unsigned int,unsigned __int64,__int64) [WindowsApplication.cpp:1895] UnrealEditor-ApplicationCore!FWindowsApplication::AppWndProc(HWND__ *,unsigned int,unsigned __int64,__int64) [WindowsApplication.cpp:925] USER32!7ffc79350000 + e858 USER32!7ffc79350000 + e4ee InkObj!7ffb9b790000 + e7e59 atlthunk!7ffc6d940000 + 1028 USER32!7ffc79350000 + e858 USER32!7ffc79350000 + e299 UnrealEditor-ApplicationCore!FWindowsPlatformApplicationMisc::PumpMessages(bool) [WindowsPlatformApplicationMisc.cpp:142] UnrealEditor!7ff70f5d0000 + 7332 UnrealEditor!7ff70f5d0000 + 2279d UnrealEditor!7ff70f5d0000 + 2288a UnrealEditor!7ff70f5d0000 + 255a0 UnrealEditor!7ff70f5d0000 + 36ea4 UnrealEditor!7ff70f5d0000 + 3a216 KERNEL32!7ffc7a970000 + 17034 ntdll!7ffc7b2f0000 + 526a1
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-168364 in the post.
| 0 |
| Component | UE - Anim - Runtime - Anim Blueprints |
|---|---|
| Affects Versions | 5.1 |
| Target Fix | 5.2 |
| Created | Oct 26, 2022 |
|---|---|
| Resolved | Jan 13, 2023 |
| Updated | Feb 12, 2023 |