Crash occurs when the user changes a Text variable to a String while the Details panel is displaying its properties, and then compiling.
Crash does not seem to occur if the Details are not visible. Crash also does not seem to occur if the variable is changed to other types.
RESULT
Crash
Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x1acf0000 VCRUNTIME140.dll!UnknownFunction [] UE4Editor-Core.dll!FGenericPlatformString::Memcpy() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\Core\Private\GenericPlatform\GenericPlatformString.cpp:21] UE4Editor-Core.dll!FString::AppendChars() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\Core\Private\Containers\String.cpp:191] UE4Editor-CoreUObject.dll!FProperty::ExportText_Direct() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\Property.cpp:840] UE4Editor-PropertyEditor.dll!FPropertyHandleBase::GetPerObjectValue() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Editor\PropertyEditor\Private\PropertyHandleImpl.cpp:2784] UE4Editor-DetailCustomizations.dll!`anonymous namespace'::FEditableTextPropertyHandle::GetText() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Editor\DetailCustomizations\Private\TextCustomization.cpp:62] UE4Editor-EditorWidgets.dll!STextPropertyEditableTextBox::GetTextWarningImageVisibility() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Editor\EditorWidgets\Private\STextPropertyEditableTextBox.cpp:1435] UE4Editor-EditorWidgets.dll!TBaseSPMethodDelegateInstance<1,STextPropertyEditableTextBox,0,EVisibility __cdecl(void)>::Execute() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\Core\Public\Delegates\DelegateInstancesImpl.h:298] UE4Editor-SlateCore.dll!ComputeDesiredSizeForBox<0>() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SBoxPanel.cpp:205] UE4Editor-SlateCore.dll!SBoxPanel::ComputeDesiredSize() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SBoxPanel.cpp:256] UE4Editor-SlateCore.dll!SWidget::CacheDesiredSize() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:831] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1476] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::Prepass_Internal() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:1460] UE4Editor-SlateCore.dll!SWidget::SlatePrepass() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\SlateCore\Private\Widgets\SWidget.cpp:608] UE4Editor-Slate.dll!PrepassWindowAndChildren() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\Slate\Private\Framework\Application\SlateApplication.cpp:1102] UE4Editor-Slate.dll!PrepassWindowAndChildren() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\Slate\Private\Framework\Application\SlateApplication.cpp:1110] UE4Editor-Slate.dll!FSlateApplication::DrawPrepass() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\Slate\Private\Framework\Application\SlateApplication.cpp:1151] UE4Editor-Slate.dll!FSlateApplication::PrivateDrawWindows() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\Slate\Private\Framework\Application\SlateApplication.cpp:1198] UE4Editor-Slate.dll!FSlateApplication::TickApplication() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\Slate\Private\Framework\Application\SlateApplication.cpp:1496] UE4Editor-Slate.dll!FSlateApplication::Tick() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\Slate\Private\Framework\Application\SlateApplication.cpp:1358] UE4Editor.exe!FEngineLoop::Tick() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\Launch\Private\LaunchEngineLoop.cpp:4940] UE4Editor.exe!GuardedMain() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\Launch\Private\Launch.cpp:169] UE4Editor.exe!GuardedMainWrapper() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:137] UE4Editor.exe!WinMain() [D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:268] UE4Editor.exe!__scrt_common_main_seh() [d:\agent\_work\5\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288] KERNEL32.DLL!UnknownFunction [] ntdll.dll!UnknownFunction []
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-96105 in the post.