It's not (I think!) that TF is catching the error - its that the app crashes if I use TFLog (which is async under the hood)
But it could be the ContinueWith thats throwing an exception, which is tearing down the initially created thread, and possibly the (TFLog-create) child thread, too.... I'll post the TF-generated crash report once TF is back up.... On Thu, Mar 15, 2012 at 10:49, Rolf Bjarne Kvinge <[email protected]> wrote: > 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 > > -- 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
