1852854 - Assertion failure: false (MOZ_ASSERT_UNREACHABLE: nsEventStatus_eConsumeNoDefault should involve a valid APZHandledResult), at nsWindow.cpp:892

Status: NEW

(Core :: Panning and Zooming, defect, P3)

Description

[Hiroyuki Ikezoe (:hiro)]

During trying to see bug 1832880 I do sometimes see this assertion, I am not sure it's caused by the touch-cancel event Fenix sends or not.

Comment 1

[Chris Peterson [:cpeterson]]

I reliably hit this assertion failure with the following steps:

1. Run a debug GeckoViewExample build in the Android emulator. (I'm using macOS 14.2.1.)
2. Load the samsung.com homepage.
3. Scroll up and down the page using swipe gestures. I'm using the touchpad scroll gestures on my MacBook Air.
4. GeckoViewExample crashes with the following assertion failure in adb logcat:

MOZ_Assert: Assertion failure: false (MOZ_ASSERT_UNREACHABLE: nsEventStatus_eConsumeNoDefault should involve a valid APZHandledResult), at widget/android/nsWindow.cpp:902

Comment 2

[Olivia Hall [:olivia]]

I'm going to dupe bug 1909322 to this one. It has a slightly different STR of using about:config. It seems tied to scrolling in an emulator, I noticed I can still change about:config values, but if I scroll, I'll get this assert in debug.

Comment 4

[Hiroyuki Ikezoe (:hiro)]

I suppose this will also be fixed bug 1897567, at least for some cases.