This is a common crash occurring among users in the 4.16 release. Users have not provided any descriptions when they crash, so additional information is not currently available.
log file attached
Source Context
233 * @param NavigationType Direction in which to move the focus (only for use with EUINavigation::Next and EUINavigation::Previous). 234 * @param NavigationReply The NavigationReply that the RuleWidget provided during the bubbled navigation event 235 * @param RuleWidget The ArrangedWidget or the widget that provided the NavigationReply 236 * 237 * @return The widget path to the resulting widget 238 */ 239 FWidgetPath ToNextFocusedPath(EUINavigation NavigationType, const FNavigationReply& NavigationReply, const FArrangedWidget& RuleWidget); 240 241 /** Get the last (leaf-most) widget in this path; assumes path is valid */ 242 TWeakPtr< SWidget > GetLastWidget() const 243 { 244 check( IsValid() ); 245 ***** return Widgets[Widgets.Num()-1]; 246 } 247 248 /** A valid path has at least one widget in it */ 249 bool IsValid() const { return Widgets.Num() > 0; } 250 251 TArray< TWeakPtr<SWidget> > Widgets; 252 TWeakPtr< SWindow > Window; 253 };
repro steps currently unknown
Assertion failed: IsValid() [File:D:\Build\++UE4+Release-4.16+Compile\Sync\Engine\Source\Runtime\SlateCore\Public\Layout/WidgetPath.h] [Line: 245] UE4Editor_SlateCore!FWeakWidgetPath::GetLastWidget() [widgetpath.h:246] UE4Editor_Slate!FSlateApplication::RoutePointerMoveEvent() [slateapplication.cpp:5152] UE4Editor_Slate!FSlateApplication::ProcessMouseMoveEvent() [slateapplication.cpp:5713] UE4Editor_Slate!FSlateApplication::OnMouseMove() [slateapplication.cpp:5647] UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() [windowsapplication.cpp:1742] UE4Editor_Core!FWindowsApplication::DeferMessage() [windowsapplication.cpp:2127] UE4Editor_Core!FWindowsApplication::ProcessMessage() [windowsapplication.cpp:867] UE4Editor_Core!FWindowsApplication::AppWndProc() [windowsapplication.cpp:714] user32!UserCallWinProcCheckWow() user32!DispatchMessageWorker() UE4Editor_Core!FWindowsPlatformMisc::PumpMessages() [windowsplatformmisc.cpp:1009] UE4Editor!FEngineLoop::Tick() [launchengineloop.cpp:3058] UE4Editor!GuardedMain() [launch.cpp:166] UE4Editor!GuardedMainWrapper() [launchwindows.cpp:134] UE4Editor!WinMain() [launchwindows.cpp:210] UE4Editor!__scrt_common_main_seh() [exe_common.inl:253] kernel32!BaseThreadInitThunk() ntdll!RtlUserThreadStart()
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There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-46389 in the post.
| 0 |
| Component | UE - Editor - UI Systems - Slate |
|---|---|
| Affects Versions | 4.16 |
| Target Fix | 4.17 |
| Created | Jun 22, 2017 |
|---|---|
| Resolved | Jul 5, 2017 |
| Updated | Apr 27, 2018 |