Bug 22324 - jobject must not be IntPtr.Zero, Parameter name: jobject, using Forms ListView grouping
Summary: jobject must not be IntPtr.Zero, Parameter name: jobject, using Forms ListVie...
Alias: None
Product: Forms
Classification: Xamarin
Component: Forms ()
Version: 1.2.2
Hardware: PC Windows
: Normal normal
Target Milestone: ---
Assignee: Bugzilla
Depends on:
Reported: 2014-08-24 00:36 UTC by Joe
Modified: 2015-02-05 06:10 UTC (History)
6 users (show)

Is this bug a regression?: ---
Last known good build:

Repro project (18.32 KB, application/octet-stream)
2014-08-24 00:36 UTC, Joe

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Description Joe 2014-08-24 00:36:23 UTC
Created attachment 7784 [details]
Repro project

Using either latest Forms stable or beta release, as well as the latest beta Xamarin for Android, I receive this uncatchable Exception, then SIGABRT from libc, on line 52 in ObservableObject.cs.

Steps to repro:
1. Click the add button a few times to add enough rows to fill the screen.
2. Quickly toggle back and forth the Switches at random with multiple fingers, 4-5+ per second.
3. The Exception should occur within 10 seconds.

Tested on Nexus 7 2013, Nexus 7 2012, and OnePlus One all on Android 4.4 ART with same results.

This might be a forms issue, it was difficult to tell from the stacktrace.
Comment 1 Joe 2014-08-24 11:27:20 UTC
Adding GC.Collect(); just before returning the SwitchCell seems to help.
Comment 2 Mohit Kheterpal 2014-08-26 07:25:00 UTC
I have checked this issue and after following steps mentioned in bug description, I am getting same issue.

Debug Log : https://gist.github.com/Mohit-Kheterpal/2d962416a727760acb4e
IDE Logs : https://gist.github.com/Mohit-Kheterpal/fc54918cf2e9150269c0

XVS 3.5.51
Comment 3 Joe 2014-08-26 21:16:39 UTC
Just tried without ART, it took longer to crash, but it did after a minute or so.
Comment 4 Jonathan Pryor 2014-08-27 11:03:18 UTC
This is (probably) a Xamarin.Forms bug, as it's access the CompoundButton.Checked property on a disposed instance.
Comment 5 Seth Rosetter 2014-09-10 13:15:45 UTC
I have confirmed the crash and will investigate further.
Comment 6 Jason Smith [MSFT] 2015-02-05 06:10:06 UTC
This should be fixed in 1.3.3-pre1