Unreal Engine Issues and Bug Tracker (UE-39558)

Description

This Jira was created from CrashReports submitted by the public due to the high number of occurrences.

Error message:

Access violation - code c0000005 (first/second chance not available)

Source Context:

  439       else
  440       {
  441       for (TObjectIterator<UObject> It; It; ++It)
  442       {
  443       UObject* TestObject = *It;
  444       
  445       // Skip Blueprint preview objects (don't allow them to be selected for debugging)
  446       if (PreviewWorld != nullptr && TestObject->IsIn(PreviewWorld))
  447       {
  448       continue;
  449       }
  450       
  451       const bool bPassesFlags = !TestObject->HasAnyFlags(RF_ClassDefaultObject) && !TestObject->IsPendingKill();
  452       const bool bGeneratedByAnyBlueprint = TestObject->GetClass()->ClassGeneratedBy != nullptr;
  453 ***** const bool bGeneratedByThisBlueprint = bGeneratedByAnyBlueprint && TestObject->IsA(GetBlueprintObj()->GeneratedClass);
  454       
  455       if (bPassesFlags && bGeneratedByThisBlueprint)
  456       {
  457       UObject *ObjOuter = TestObject;
  458       UWorld *ObjWorld = nullptr;
  459       do// Run through at least once in case the TestObject is a UGameInstance
  460       {
  461       UGameInstance *ObjGameInstance = Cast<UGameInstance>(ObjOuter);
  462       
  463       ObjOuter = ObjOuter->GetOuter();
  464       ObjWorld = ObjGameInstance ? ObjGameInstance->GetWorld() : Cast<UWorld>(ObjOuter);
  465       } while (ObjWorld == nullptr && ObjOuter != nullptr);
  466       
  467       if (ObjWorld)
  468       {

Most recent user affected CL: 3224400

Logs:
[Link Removed]
[Link Removed]
[Link Removed]

CrashReporter User Descriptions:

Crashed when opening a blueprint that had a removed parent blueprint. Maybe provide a reparent option?
joseph.wysosky - opening an asset without a valid parent class

Steps to Reproduce

1. Create a Blueprint based on Actor (A).
2. Open A and Compile it
3. Save A
4. Create a Blueprint based on A (B)
5. Open B and Compile it
6. Save B
7. Shut down the editor and delete A
8. Restart the editor and open B. When the warning dialog is displayed click 'Yes'.

Callstack

UE4Editor_Kismet!SBlueprintEditorSelectedDebugObjectWidget::GenerateDebugObjectNames() [sblueprinteditorselecteddebugobjectwidget.cpp:454]
UE4Editor_Kismet!SBlueprintEditorSelectedDebugObjectWidget::Construct() [sblueprinteditorselecteddebugobjectwidget.cpp:42]
UE4Editor_Kismet!TDecl<SBlueprintEditorSelectedDebugObjectWidget,RequiredArgs::T1RequiredArgs<TSharedPtr<FBlueprintEditor,0> & __ptr64> >::operator<<=() [declarativesyntaxsupport.h:1079]
UE4Editor_Kismet!FBlueprintEditorToolbar::FillDebuggingToolbar() [sblueprinteditortoolbar.cpp:619]
UE4Editor_Kismet!TBaseSPMethodDelegateInstance<0,FBlueprintEditorToolbar,0,TTypeWrapper<void> __cdecl() [delegateinstancesimpl.h:318]
UE4Editor_Kismet!TBaseSPMethodDelegateInstance<0,FBlueprintEditorToolbar,0,void __cdecl() [delegateinstancesimpl.h:425]
UE4Editor_Slate!FExtender::Apply() [multiboxextender.cpp:219]
UE4Editor_Slate!FToolBarBuilder::ApplyHook() [multiboxbuilder.cpp:489]
UE4Editor_Slate!FToolBarBuilder::EndSection() [multiboxbuilder.cpp:479]
UE4Editor_UnrealEd!FAssetEditorToolkit::GenerateToolbar() [asseteditortoolkit.cpp:970]
UE4Editor_UnrealEd!FAssetEditorToolkit::RegenerateMenusAndToolbars() [asseteditortoolkit.cpp:1033]
UE4Editor_Kismet!FWorkflowCentricApplication::SetCurrentMode() [workflowcentricapplication.cpp:73]
UE4Editor_Kismet!FBlueprintEditor::SetCurrentMode() [blueprinteditor.cpp:1645]
UE4Editor_Kismet!FBlueprintEditor::RegisterApplicationModes() [blueprinteditor.cpp:1813]
UE4Editor_Kismet!FBlueprintEditor::InitBlueprintEditor() [blueprinteditor.cpp:1698]
UE4Editor_Kismet!FBlueprintEditorModule::CreateBlueprintEditor() [blueprinteditormodule.cpp:284]
UE4Editor_AssetTools!FAssetTypeActions_Blueprint::OpenAssetEditor() [assettypeactions_blueprint.cpp:84]
UE4Editor_UnrealEd!FAssetEditorManager::OpenEditorForAsset() [asseteditormanager.cpp:338]
UE4Editor_AssetTools!FAssetTypeActions_Base::AssetsActivated() [assettypeactions_base.h:41]
UE4Editor_ContentBrowser!SContentBrowser::OnAssetsActivated() [scontentbrowser.cpp:1822]
UE4Editor_ContentBrowser!TBaseSPMethodDelegateInstance<0,SContentBrowser,0,TTypeWrapper<void> __cdecl() [delegateinstancesimpl.h:318]
UE4Editor_ContentBrowser!TBaseSPMethodDelegateInstance<0,SContentBrowser,0,void __cdecl() [delegateinstancesimpl.h:425]
UE4Editor_ContentBrowser!TBaseDelegate<void,TArray<FAssetData,FDefaultAllocator> const & __ptr64,enum EAssetTypeActivationMethod::Type>::ExecuteIfBound() [delegatesignatureimpl.inl:609]
UE4Editor_ContentBrowser!SAssetView::OnListMouseButtonDoubleClick() [sassetview.cpp:3657]
UE4Editor_ContentBrowser!TBaseSPMethodDelegateInstance<0,SAssetView,0,TTypeWrapper<void> __cdecl() [delegateinstancesimpl.h:318]
UE4Editor_ContentBrowser!TBaseSPMethodDelegateInstance<0,SAssetView,0,void __cdecl() [delegateinstancesimpl.h:425]
UE4Editor_ContentBrowser!TBaseDelegate<void,TSharedPtr<FAssetViewItem,0> >::ExecuteIfBound() [delegatesignatureimpl.inl:609]
UE4Editor_ContentBrowser!SListView<TSharedPtr<FAssetViewItem,0> >::Private_OnItemDoubleClicked() [slistview.h:718]
UE4Editor_ContentBrowser!STableRow<TSharedPtr<FAssetViewItem,0> >::OnMouseButtonDoubleClick() [stablerow.h:264]
UE4Editor_Slate!<lambda_eeb33fd1b480e3cad58a1531d90d2e14>::operator() [slateapplication.cpp:5404]
UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FBubblePolicy,FPointerEvent,<lambda_eeb33fd1b480e3cad58a1531d90d2e14> >() [slateapplication.cpp:215]
UE4Editor_Slate!FSlateApplication::RoutePointerDoubleClickEvent() [slateapplication.cpp:5402]
UE4Editor_Slate!FSlateApplication::ProcessMouseButtonDoubleClickEvent() [slateapplication.cpp:5387]
UE4Editor_Slate!FSlateApplication::OnMouseDoubleClick() [slateapplication.cpp:5365]
UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() [windowsapplication.cpp:1656]
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>

Community References

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Fixed

Component	UE - Gameplay - Blueprint
Affects Versions	4.12, 4.13, 4.14
Target Fix	4.15

Fix Commit	3233895
Main Commit	3236017

Created	Dec 9, 2016
Resolved	Dec 14, 2016
Updated	Apr 27, 2018

View Jira Issue

UE-39558

[CrashReport] UE4Editor_Kismet!SBlueprintEditorSelectedDebugObjectWidget::GenerateDebugObjectNames() [sblueprinteditorselecteddebugobjectwidget.cpp:454]

[CrashReport] UE4Editor_Kismet!SBlueprintEditorSelectedDebugObjectWidget::GenerateDebugObjectNames() [sblueprinteditorselecteddebugobjectwidget.cpp:454]

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