I recently migrated from 4.7 to 4.8 release. When opening a blueprint, the editor hangs for a moment before crashing. If I switch the engine back to 4.7.6, I am able to open any of the blueprints with no issues at all. Here is the crash report that I am currently getting on 4.8:
MachineId:64A88B4F44C2A1A342CECA9EB8E6CF32
EpicAccountId:f2167ab15d8a478088a3f8c4dfbe5abc
Unknown exception - code 00000001 (first/second chance not available)
"Assertion failed: (Index >= 0) & (Index < ArrayNum) [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.8\Engine\Source\Runtime\Core\Public\Containers\Array
KERNELBASE
UE4Editor_Core!FOutputDeviceWindowsError::Serialize() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\core\private\windows\windowsplatformoutputdevices.cpp:95]
UE4Editor_Core!FOutputDevice::Logf__VA() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\core\private\misc\outputdevice.cpp:144]
UE4Editor_Core!FDebug::AssertFailed() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\core\private\misc\outputdevice.cpp:355]
UE4Editor_BlueprintGraph!UK2Node::ExpandSplitPin() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\editor\blueprintgraph\private\k2node.cpp:687]
UE4Editor_BlueprintGraph!UK2Node::ExpandNode() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\editor\blueprintgraph\private\k2node.cpp:712]
UE4Editor_BlueprintGraph!UK2Node_VariableGet::ExpandNode() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\editor\blueprintgraph\private\k2node_variableget.cpp:386]
UE4Editor_KismetCompiler!FKismetCompilerContext::ExpansionStep() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\editor\kismetcompiler\private\kismetcompiler.cpp:2535]
UE4Editor_KismetCompiler!FKismetCompilerContext::ProcessOneFunctionGraph() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\editor\kismetcompiler\private\kismetcompiler.cpp:3043]
UE4Editor_KismetCompiler!FKismetCompilerContext::CreateFunctionList() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\editor\kismetcompiler\private\kismetcompiler.cpp:3132]
UE4Editor_KismetCompiler!FKismetCompilerContext::Compile() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\editor\kismetcompiler\private\kismetcompiler.cpp:3371]
UE4Editor_KismetCompiler!FKismet2CompilerModule::CompileBlueprintInner() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\editor\kismetcompiler\private\kismetcompilermodule.cpp:99]
UE4Editor_KismetCompiler!FKismet2CompilerModule::CompileBlueprint() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\editor\kismetcompiler\private\kismetcompilermodule.cpp:155]
UE4Editor_UnrealEd!FKismetEditorUtilities::GenerateBlueprintSkeleton() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\editor\unrealed\private\kismet2\kismet2.cpp:893]
UE4Editor_UnrealEd!FBlueprintEditorUtils::RegenerateBlueprintClass() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\editor\unrealed\private\kismet2\blueprinteditorutils.cpp:1412]
UE4Editor_CoreUObject!FLinkerLoad::RegenerateBlueprintClass() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\coreuobject\private\blueprint\blueprintsupport.cpp:332]
UE4Editor_CoreUObject!FLinkerLoad::FinalizeBlueprint() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\coreuobject\private\blueprint\blueprintsupport.cpp:1140]
UE4Editor_CoreUObject!FLinkerLoad::Preload() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3098]
UE4Editor_CoreUObject!FLinkerLoad::CreateExport() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3698]
UE4Editor_CoreUObject!FLinkerLoad::IndexToObject() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3882]
UE4Editor_CoreUObject!FLinkerLoad::CreateExport() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3413]
UE4Editor_CoreUObject!FLinkerLoad::IndexToObject() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3882]
UE4Editor_CoreUObject!FLinkerLoad::CreateExport() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3413]
UE4Editor_CoreUObject!FLinkerLoad::IndexToObject() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3882]
UE4Editor_CoreUObject!FLinkerLoad::CreateExport() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3413]
UE4Editor_CoreUObject!FLinkerLoad::CreateExportAndPreload() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2581]
UE4Editor_CoreUObject!FLinkerLoad::LoadAllObjects() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2689]
UE4Editor_CoreUObject!LoadPackageInternal() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:997]
UE4Editor_CoreUObject!ResolveName() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:677]
UE4Editor_CoreUObject!StaticLoadObjectInternal() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:764]
UE4Editor_CoreUObject!StaticLoadObject() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:826]
UE4Editor_Kismet!FBlueprintEditor::LoadLibrariesFromAssetRegistry() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\editor\kismet\private\blueprinteditor.cpp:1512]
UE4Editor_Kismet!FBlueprintEditor::CommonInitialization() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\editor\kismet\private\blueprinteditor.cpp:1434]
UE4Editor_Kismet!FBlueprintEditor::InitBlueprintEditor() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\editor\kismet\private\blueprinteditor.cpp:1580]
UE4Editor_Kismet!FBlueprintEditorModule::CreateBlueprintEditor() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\editor\kismet\private\blueprinteditormodule.cpp:152]
UE4Editor_AssetTools!FAssetTypeActions_Blueprint::OpenAssetEditor() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\developer\assettools\private\assettypeactions\assettypeactions_blueprint.cpp:78]
UE4Editor_UnrealEd!FAssetEditorManager::OpenEditorForAsset() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\editor\unrealed\private\toolkits\asseteditormanager.cpp:303]
UE4Editor_AssetTools!FAssetTypeActions_Base::AssetsActivated() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\developer\assettools\public\assettypeactions_base.h:37]
UE4Editor_ContentBrowser!SContentBrowser::OnAssetsActivated() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\editor\contentbrowser\private\scontentbrowser.cpp:1603]
UE4Editor_ContentBrowser!TBaseSPMethodDelegateInstance<0,SContentBrowser,0,TTypeWrapper cdecl(TArray const & ptr64,enum EAssetTypeActivationMethod::Type)>::Execute() [d:\buildfarm\buildmachine++depot+ue4-releases+4.8\engine\source\runtime\core\public\delegates\delegateinstancesimpl_variadics.inl:282]
UE4Editor_ContentBrowser!TBaseSPMethodDelegateInstance<0,SContentBrowser,0,void cdecl(TArray const & ptr64,enum EAssetTypeActivationMethod::Type)>::ExecuteIfSafe() [d:\buildfarm\buildmachine++depot+ue4-releases+4.8\engine\source\runtime\core\public\delegates\delegateinstancesimpl_variadics.inl:388]
UE4Editor_ContentBrowser!SAssetView::OnListMouseButtonDoubleClick() [d:\buildfarm\buildmachine++depot+ue4-releases+4.8\engine\source\editor\contentbrowser\private\sassetview.cpp:3222]
UE4Editor_ContentBrowser!TBaseSPMethodDelegateInstance<0,SAssetView,0,TTypeWrapper cdecl(TSharedPtr)>::Execute() [d:\buildfarm\buildmachine++depot+ue4-releases+4.8\engine\source\runtime\core\public\delegates\delegateinstancesimpl_variadics.inl:282]
UE4Editor_ContentBrowser!TBaseSPMethodDelegateInstance<0,SAssetView,0,void cdecl(TSharedPtr)>::ExecuteIfSafe() [d:\buildfarm\buildmachine++depot+ue4-releases+4.8\engine\source\runtime\core\public\delegates\delegateinstancesimpl_variadics.inl:388]
UE4Editor_ContentBrowser!TBaseDelegate >::ExecuteIfBound() [d:\buildfarm\buildmachine++depot+ue4-releases+4.8\engine\source\runtime\core\public\delegates\delegatesignatureimpl_variadics.inl:519]
UE4Editor_ContentBrowser!SListView >::Private_OnItemDoubleClicked() [d:\buildfarm\buildmachine++depot+ue4-releases+4.8\engine\source\runtime\slate\public\widgets\views\slistview.h:689]
UE4Editor_ContentBrowser!STableRow >::OnMouseButtonDoubleClick() [d:\buildfarm\buildmachine++depot+ue4-releases+4.8\engine\source\runtime\slate\public\widgets\views\stablerow.h:252]
UE4Editor_Slate!::operator()() [d:\buildfarm\buildmachine++depot+ue4-releases+4.8\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:4101]
UE4Editor_Slate!FEventRouter::Route >() [d:\buildfarm\buildmachine++depot+ue4-releases+4.8\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:212]
UE4Editor_Slate!FSlateApplication::ProcessMouseButtonDoubleClickEvent() [d:\buildfarm\buildmachine++depot+ue4-releases+4.8\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:4102]
UE4Editor_Slate!FSlateApplication::OnMouseDoubleClick() [d:\buildfarm\buildmachine++depot+ue4-releases+4.8\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:4082]
UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\core\private\windows\windowsapplication.cpp:1348]
UE4Editor_Core!FWindowsApplication::DeferMessage() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\core\private\windows\windowsapplication.cpp:1711]
UE4Editor_Core!FWindowsApplication::ProcessMessage() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\core\private\windows\windowsapplication.cpp:706]
UE4Editor_Core!FWindowsApplication::AppWndProc() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\core\private\windows\windowsapplication.cpp:628]
user32
user32
UE4Editor_Core!FWindowsPlatformMisc::PumpMessages() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\core\private\windows\windowsplatformmisc.cpp:792]
UE4Editor!FEngineLoop::Tick() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\launch\private\launchengineloop.cpp:2319]
UE4Editor!GuardedMain() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\launch\private\launch.cpp:142]
UE4Editor!GuardedMainWrapper() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]
UE4Editor!WinMain() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\launch\private\windows\launchwindows.cpp:200]
Any help would be appreciated. I am unable to use 4.8 until this is resolved, as no blueprints will currently open.