Notice (2018-05-24): bugzilla.xamarin.com is now in
Please join us on
Visual Studio Developer Community and in the
Mono organizations on
GitHub to continue tracking issues. Bugzilla will remain
available for reference in read-only mode. We will continue to work
on open Bugzilla bugs, copy them to the new locations
as needed for follow-up, and add the new items under Related
Our sincere thanks to everyone who has contributed on this bug
tracker over the years. Thanks also for your understanding as we
make these adjustments and improvements for the future.
Please create a new report on
Developer Community or GitHub with
your current version information, steps to reproduce, and relevant error
messages or log files if you are hitting an issue that looks similar to
this resolved bug and you do not yet see a matching new report.
Occasionally when changing Label text (label.Text = value) I get the following exception and stack:
System.ArgumentException: 'jobject' must not be IntPtr.Zero.
Parameter name: jobject
0x57 in Android.Widget.TextView.set_TextFormatted at /Users/builder/data/lanes/1502/4e3eea68/source/monodroid/src/Mono.Android/platforms/android-21/src/generated/Android.Widget.TextView.cs:2897,6 C#
0x15 in Android.Widget.TextView.set_Text at /Users/builder/data/lanes/1502/4e3eea68/source/monodroid/src/Mono.Android/platforms/android-21/src/generated/Android.Widget.TextView.cs:2908,5 C#
0x98 in Xamarin.Forms.Platform.Android.LabelRenderer.UpdateText C#
0xC6 in Xamarin.Forms.Platform.Android.LabelRenderer.OnElementPropertyChanged C#
0x12 in Xamarin.Forms.BindableObject.OnPropertyChanged C#
0xFF in Xamarin.Forms.BindableObject.SetValueActual C#
0x23E in Xamarin.Forms.BindableObject.SetValueCore C#
0x75 in Xamarin.Forms.BindableObject.SetValue C#
0x5 in Xamarin.Forms.BindableObject.SetValue C#
0x7 in Xamarin.Forms.Label.set_Text C#
Hopefully the stack trace is enough to find this bug.
This seems to be a new problem with 184.108.40.20664-pre3 because I did not see these exception before and my app did not change.
Could you please attach a small reproduction triggering this issue so we can investigate further, and fix it for 1.4.3 if its' a regression ?
The Xamarin.Forms team
I don't think I can generate a sample project because this seems to be some corner case which only happens under some conditions in my app and I can't send you my app.
I double checked obvious things like BindingContext and Parent are already set for this label when setting Text. Also everything is being done from the dispatcher thread. So I don't THINK the problem is with my code especially since this seems to be a new issue.
I was hoping that looking at the stack trace tells you what is going wrong...
Thank you for taking the time to submit this report. After reviewing the description of this bug, we believe it no longer affects the current version of Xamarin.Forms. If you are still experiencing the issue after updating your packages, please reopen this report with an attached reproduction.
For your convenience, we have created some reproduction best practices viewable here: https://gist.github.com/jassmith/92405c300e54a01dcc6d
Xamarin Forms Team