[4.11 p7] controllers crash html5 slate

Development Platform & Builds
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1

When I use a controller in the editor or in a packaged windows build, everything works as expected.

When I use only a keyboard and a mouse in html5, it works as expected.

When I use a controller in html5, it crashes, on pressing the right trigger (on a xbox 360 controller) for example I get:

Expression (Key.IsValid()) failed in D:\BuildFarm\buildmachine_++UE4+Release-4.11\Engine\Source\Runtime\Slate\Private\Framework\Application\SlateApplication.cpp:5180!
Check console for details.

FSlateApplication::OnControllerButtonReleased?5()
undefined?T()
FHTML5InputInterface::SendControllerEvents()
FHTML5Application::PollGameDeviceState(float)
FSlateApplication::PollGameDeviceState()
FEngineLoop::Tick()
HTML5_Tick()
dynCall_v
2

Can confirm this also happens for me in Firefox, with a controller plugged in. Once the controller is unplugged it runs ok. UE4.10.4 for me

3

Hey,

Could either one of you provide me with the link to your project that you’re receiving this crash on? Just wondering, did either of you test this out on a brand new project to see if the same thing happened?

Have either of you guys looked into [html5.h gamepad information][1] before?

html5.h — Emscripten 3.1.33-git (dev) documentation

4

It happens if you create a new Tappy Chicken project in 4.10.4, and run with the controller plugged in.

5

Thank you for bringing this to our attention. While this is happening in 4.10.4, I also tested this in 4.11 as well and was unable to reproduce this issue. Can you please confirm that you also are not having this issue in 4.11?

6

Same crash still occurs for me in 4.11 Preview 7, running Tappy Chicken in Firefox with controller plugged in.

7

I have tested this thoroughly and submitted a bug report to our Developers. UE-28513 is the report being used to track this issue. Thank you for bringing this to our attention.

If you have any further questions, let us know!