WebDeviceInputSystem._pointerCancelEvent Uncaught TypeError: Cannot set property '2' of undefined

pink_blue · August 22, 2022, 8:01am

Hi!
Our project with babylonjs is Published, but sometimes user’s Chrome for Android reports error: Uncaught TypeError: Cannot set property ‘2’ of undefined.
This is where the error occurs:

github.com

BabylonJS/Babylon.js/blob/master/packages/dev/core/src/DeviceInput/webDeviceInputSystem.ts#L592


      
                          this._onInputChanged(DeviceType.Mouse, 0, deviceEvent);

                      }

                  }

              } else {

                  const deviceSlot = this._activeTouchIds.indexOf(evt.pointerId);

          

                  if (this._elementToAttachTo.hasPointerCapture?.(evt.pointerId)) {

                      this._elementToAttachTo.releasePointerCapture(evt.pointerId);

                  }

          

                  this._inputs[DeviceType.Touch][deviceSlot][PointerInput.LeftClick] = 0;

          

                  const deviceEvent: IUIEvent = DeviceEventFactory.CreateDeviceEvent(DeviceType.Touch, deviceSlot, PointerInput.LeftClick, 0, this, this._elementToAttachTo);

          

                  this._onInputChanged(DeviceType.Touch, deviceSlot, deviceEvent);

          

                  this._activeTouchIds[deviceSlot] = -1;

                  this._onDeviceDisconnected(DeviceType.Touch, deviceSlot);

              }

          };

Maybe, this._inputs[DeviceType.Touch][deviceSlot] sometimes is undefined.
I can’t reproduce this error on my mobile, could you help me?
The babylonjs version is 5.9.0, thanks!

RaananW · August 22, 2022, 11:00am

pinging @PolygonalSun

PolygonalSun · August 22, 2022, 9:33pm

Hey @pink_blue, by any chance, did any of the users who found this provide any kind of repro steps or any more information that we could use to figure out what’s going on?

sonipapa · November 14, 2023, 2:54am

Hi I’m also seeing the same error with the same error trace for some users on Android, but I also couldn’t reproduce on my end. The Babylon JS version 5.54.0.

PolygonalSun · November 15, 2023, 8:35pm

I believe that this may have been fixed as a part of version 6 (I think specifically with this PR: WebDeviceInputSystem: Add additional checks for pointermove started Touch events by PolygonalSun · Pull Request #14174 · BabylonJS/Babylon.js (github.com)). Is there any reason for you using that specific version of BJS?

Topic		Replies	Views
TypeError: Cannot read property 2 of undefined Bugs	5	589	February 12, 2021
[Error] TypeError: undefined is not an object (evaluating 'e._inputs[Mi.Touch][c][Oi.LeftClick]=0') Bugs	4	1182	August 24, 2023
Pointer capture failing for Babylon pointer observable during a scroll event Bugs pointerevents , observables	9	785	August 22, 2023
Event has no pointerId in 4.2.0-alpha.27 Bugs	15	1162	August 3, 2020
Unable to find device Touch Bugs mobile	25	1677	February 22, 2022

WebDeviceInputSystem._pointerCancelEvent Uncaught TypeError: Cannot set property '2' of undefined

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