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.
I'm Developing an APP wich communicate with BLE devices. everything works fine so fare but when i switch multiple times from an activity i get an undebuggable exception:
01-26 09:06:43.040 I/Timeline( 7341): Timeline: Activity_launch_request id:BLEAPPtime:710885426 Object reference not set to an instance of an object. System.NullReferenceException: Object reference not set to an instance of an object. at Xamarin.VisualStudio.Debugger.AD7DebugExceptionEvent..ctor(Thread thread, String description) in C:\Users\builder\data\lanes\2599\1390b70a\source\XamarinVS\src\Core\VisualStudio\Debugging\MonoTools.Engine\AD7Events.cs:line 433 at Xamarin.VisualStudio.Debugger.ExceptionsAdapter.OnUnhandledException(Object sender, TargetEventArgs args) in C:\Users\builder\data\lanes\2599\1390b70a\source\XamarinVS\src\Core\VisualStudio\Debugging\MonoTools.Engine\ExceptionsAdapter.cs:line 67 at Mono.Debugging.Client.DebuggerSession.OnTargetEvent(TargetEventArgs args) at Mono.Debugging.Soft.SoftDebuggerSession.HandleBreakEventSet(Event es, Boolean dequeuing) at Mono.Debugging.Soft.SoftDebuggerSession.HandleEventSet(EventSet es) at Mono.Debugging.Soft.SoftDebuggerSession.EventHandler() Thread finished: #6 The thread '' (0x6) has exited with code 0 (0x0).
I don't know where it came from if i debug every single step is passing until my activity finished at the last code bracket then i get this weird exception.
Does someone has any clue how to debug this? or about this BUG.
Created attachment 14845 [details]
Created attachment 14895 [details]
I have the same issue in conjunction with Christ Riesgo's carouselview (horizotal scrollview) when swiping from one to another page) with Xamarin.Forms .
This only occurs in Android (18.104.22.168). Xamarin.iOS (22.214.171.124) works fine.
Its Fixed nothing to do with Xamarin one TIP use Background threading... sometimes when ya have a long running process.
I will mark this as a duplicate of a new bug I have filed to gather all of the information reported by various customers for this issue so far.
*** This bug has been marked as a duplicate of bug 39433 ***