Multi touch broken on Android

I am using a PanResponder attached to a <G> element (but I also tried to attach it directly to a <Path> element - same result).

When I use more than one finger, the app crashes on Android (works perfectly fine on iOS). Here is the crash report:

--------- beginning of crash 08-15 11:32:23.383 1363-1363/com.zazzle E/AndroidRuntime: FATAL EXCEPTION: main Process: com.zazzle, PID: 1363 com.facebook.react.bridge.AssertionException: Gesture start time must be initialized at com.facebook.react.bridge.SoftAssertions.assertCondition(SoftAssertions.java:37) at com.facebook.react.uimanager.events.TouchEvent.init(TouchEvent.java:81) at com.facebook.react.uimanager.events.TouchEvent.obtain(TouchEvent.java:49) at com.horcrux.svg.SvgView.dispatch(SvgView.java:124) at com.horcrux.svg.SvgView.handleTouchEvent(SvgView.java:149) at com.horcrux.svg.SvgView.dispatchTouchEvent(SvgView.java:92) at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632) at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321) at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632) at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321) at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632) at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321) at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632) at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321) at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632) at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321) at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632) at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321) at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632) at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321) at com.android.internal.policy.DecorView.superDispatchTouchEvent(DecorView.java:414) at com.android.internal.policy.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1808) at android.app.Activity.dispatchTouchEvent(Activity.java:3064) at android.support.v7.view.WindowCallbackWrapper.dispatchTouchEvent(WindowCallbackWrapper.java:67) at com.android.internal.policy.DecorView.dispatchTouchEvent(DecorView.java:376) at android.view.View.dispatchPointerEvent(View.java:10243) at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:4438) at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:4306) at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3853) at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3906) at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3872) at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3999) at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3880) at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:4056) at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3853) at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3906) at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3872) at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3880) at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3853) at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:6247) at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:6221) at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:6182) at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:6350) at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:185) at android.view.InputEventReceiver.nativeConsumeBatchedInputEvents(Native Method) at android.view.InputEventReceiver.consumeBatchedInputEvents(InputEventReceiver.java:176) at android.view.ViewRootImpl.doConsumeBatchedInput(ViewRootImpl.java:6321) at android.view.ViewRootImpl$ConsumeBatchedInputRunnable.run(ViewRootImpl.java:6373) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:874) at android.view.Choreographer.doCallbacks(Choreographer.java:686) at android.view.Choreographer.doFrame(Choreographer.java:615) 08-15 11:32:23.384 1363-1363/com.zazzle E/AndroidRuntime: at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:860) at android.os.Handler.handleCallback(Handler.java:751) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:154) at android.app.ActivityThread.main(ActivityThread.java:6121) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:889) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:779)

[psivanov]

I think I fixed the issue. Will submit a PR soon.

mGestureStartTime = TouchEvent.UNSET; should not be set on MotionEvent.ACTION_POINTER_UP, but rather on MotionEvent.ACTION_UP

[ScrimpyCat]

Experienced the same issue and the pull request fixes it for me as well.