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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 (188.8.131.52). Xamarin.iOS (184.108.40.206) 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 ***