[MonoTouch] Exceptions with no stack trace in my code

[Dean Cleaver]

That explains the monotouch exceptions - still doesn't explain the web service exceptions. They're always the opposite - I *don't* want them on the main thread, so they're in threads of their own - but all web service calls are wrapped in a class in a separate project, so I would expect a stack trace of at least MainProject.SomeFunction -> SubProject.SomeFunction -> WebService.

Dino

-----Original Message-----
From: Nic Wise [mailto:nicw at fastchicken.co.nz] 
Sent: Tuesday, December 13, 2011 11:40 AM
To: Dean Cleaver
Cc: Rolf Bjarne Kvinge; monotouch at lists.ximian.com
Subject: Re: [MonoTouch] Exceptions with no stack trace in my code

To interrupt:

yes.

try this:

>     this.InvokeOnMainThread( delegate
>
>     {
try {} catch {};
>     });

it's two things running in parallel, so your code will be well past the invoke by the time the invoke finishes...  if that makes sense.



On Tue, Dec 13, 2011 at 16:54, Dean Cleaver <dean.cleaver at xceptionsoftware.com> wrote:
> Rolf,
>
>
>
> I think I have a lead on these. Would it happen if I did this:
>
>
>
> try
>
> {
>
>     this.InvokeOnMainThread( delegate
>
>     {
>
>         // my code here
>
>     });
>
> }
>
> catch
>
> {
>
>     // report exception
>
> }
>
>
>
> Basically, does the invoking a delegate mean that there is no stack 
> trace from the calling code?
>
>
>
> Dino
>
>
>
> From: monotouch-bounces at lists.ximian.com
> [mailto:monotouch-bounces at lists.ximian.com] On Behalf Of Dean Cleaver
> Sent: Tuesday, December 13, 2011 9:54 AM
> To: Rolf Bjarne Kvinge
>
>
> Cc: monotouch at lists.ximian.com
> Subject: Re: [MonoTouch] Exceptions with no stack trace in my code
>
>
>
> Rolf,
>
>
>
> No – I’m not. I do use web services, but never Begin/End – always 
> direct calls, even if they are on different threads. But occasionally 
> I get those errors trapped and reported back.
>
>
>
> And I just got this one trapped and returned:
>
>
>
> MonoTouch.Foundation.MonoTouchException: Objective-C exception thrown. Name:
> NSInternalInconsistencyException Reason: Attempt to create two 
> animations for cell
>
>
>
> No idea how that occurred, nor the “two animations for cell” when I 
> don’t create any. Only animation I have done is on a UIView which has 
> nothing to do with any table cells. Also got this one:
>
>
>
> MonoTouch.Foundation.MonoTouchException: Objective-C exception thrown. Name:
> NSInternalInconsistencyException Reason: Invalid update: invalid 
> number of rows in section 0. Attempt to delete more rows than exist in section.
>
>
>
> But that’s it – nothing more than that. Not a hint of any of my code 
> or anything.
>
>
>
> Dino
>
>
>
> From: Rolf Bjarne Kvinge [mailto:rolf at xamarin.com]
> Sent: Tuesday, December 13, 2011 6:28 AM
> To: Dean Cleaver
> Cc: monotouch at lists.ximian.com
> Subject: Re: [MonoTouch] Exceptions with no stack trace in my code
>
>
>
> Hi,
>
>
>
> It looks like you're using (async) web services. The processing is 
> automatically done on a separate thread, so it is expected that none 
> of your code shows up in the stack trace (you provided an event 
> handler or a callback which will be called when the processing is 
> done, that's when your code will show up).
>
>
>
> In this case it looks like the connection to the server was 
> interrupted, though exactly how you should deal with that depends on your app.
>
>
>
> Rolf
>
>
>
> On Tue, Dec 13, 2011 at 4:35 AM, Dean Cleaver 
> <dean.cleaver at xceptionsoftware.com> wrote:
>
> Hi,
>
>
>
> I am getting various exceptions from a web service in code trapped I 
> believe by the “AppDomain.CurrentDomain.UnhandledException”, and then 
> reported back to me.
>
>
>
> System.Net.WebException: Error: ConnectFailure (interrupted) --->
> System.Net.Sockets.SocketException: interrupted at 
> System.Net.Sockets.Socket.Connect (System.Net.EndPoint remoteEP) 
> [0x00000] in :0 at System.Net.WebConnection.Connect 
> (System.Net.HttpWebRequest request) [0x00000] in :0
> --- End of inner exception stack trace --- at 
> System.Net.HttpWebRequest.EndGetRequestStream (IAsyncResult 
> asyncResult) [0x00000] in :0 at 
> System.Net.HttpWebRequest.GetRequestStream () [0x00000] in :0 at 
> System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke
> (System.String method_name, System.Object[] parameters) [0x00000] in 
> :0
>
>
>
> Confusing thing is, there is no reference to any of my code at all. 
> How can this happen? Surely somewhere in every call regardless of the 
> thread, there has to be at least one function of mine – given I never 
> directly create a thread calling code other than mine.
>
>
>
> Any ideas how to work out how this exception and other similar ones 
> are occurring?
>
>
>
> Dino
>
>
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>
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