Hi, These issues might be related. Have in mind that TestFlight will handle NullReferenceExceptions as crashes (and won't let you catch them).
Rolf On Thu, Mar 15, 2012 at 11:39 AM, Nic Wise <[email protected]> wrote: > Hi there > > I'm having a few issues in the newest versions of MT, mostly around > Threading (ok, ALL around threading). > > this one is a fairly major, but easy to work around, one for me: > > https://bugzilla.xamarin.com/show_bug.cgi?id=3676 > > I'm getting it when I use NewtonSoft Json.net from a thread. I worked > around it by using it from the UI thread, and caching the resulting > object (not a big deal at all in this case). The DLL I'm using hasn't > changed for a long time..... > > > > However, I'm also having an issue with TestFlight's logging. If I log > in a thread, sometimes, I get a segfault. Not every time, but always > in the same place, and ALWAYS in a thread. The thread code is like > this: > > Task.Factory.StartNew(() => { > CalculateSummary (); > }).ContinueWith(t => { > if (oncomplete != null) oncomplete(); > }, new UIKitScheduler()); > > (UIKitScheduler is this: https://gist.github.com/1431457 ) > CalculateSummary loads a bunch of stuff from SQLite, then the last line is: > > Util.Log ("recalculating took {0}ms".Fmt (sw.ElapsedMilliseconds)); > > It is possible that the oncomplete is throwing an error, which I need > to check out - I've had issues with threading disappearing if the > continue throws an uncaught exception. > > Anywho, Util.Log does a Debug.WriteLine (or Console.WriteLine, same > result), and a TestFlight.Log. The first works always. The latter > crashes _sometimes_, usually if he app is busy - ie, I'm moving > between screens (which triggers calculations) etc. But sometimes just > if it's sitting idle. I've tried putting the logging into a > InvokeOnMainThread, but with the same result. > > I wasn't using TF before, but I've not had the Json problem in > previous versions (I have a lot of production code out there which is > working doing this). That said, I wasn't using Tasks before (I was > using the threadpool), which may also be it! > > Any ideas? did this change after 5.2.4 (I'm on 5.2.8 I think at the moment) > > I have a semi-stacktrace thing, but it has almost no actual info in > it. I'm going to try a debug build tonight, and see if I can get more > info out. console just shows that the app segfaulted (error 11 I > think??) > > Outside of that, everything is exceptionally delicious with iOS5, the > appearance API's, and the Task API's :) > > N > > -- > Nic Wise > t. +44 7788 592 806 | @fastchicken | http://www.linkedin.com/in/nicwise > b. http://www.fastchicken.co.nz/ > > Nearest Bus: find when the next bus is coming to your stop. > http://goo.gl/Vcz1p > mobileAgent (for FreeAgent): get your accounts in your pocket. > http://goo.gl/IuBU > Trip Wallet: Keep track of your budget on the go: http://goo.gl/ePhKa > London Bike App: Find the nearest Boris Bike, and get riding! > http://goo.gl/Icp2 > _______________________________________________ > MonoTouch mailing list > [email protected] > http://lists.ximian.com/mailman/listinfo/monotouch >
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