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Since Xamarin.iOS 7.0.6, there seems to be a problem with execution of async methods that have optional parameters.
This only occurs when testing on a real device... on the simulator it works as expected.
On Xamarin.iOS < 7.0.5, it also works as expected on a real device & the simulator
I'm attaching a simple test project that shows the problem.
Below is my About Xamarin Studio info (I'm currently on Stable Channel, but it also occurs on Beta & Alpha channels)
=== Xamarin Studio ===
Version 4.2.2 (build 2)
Installation UUID: 6a437fa0-502a-46be-bd1e-508d7177f4c8
Mono 3.2.6 ((no/9b58377)
GTK+ 2.24.23 theme: Raleigh
Package version: 302060000
=== Apple Developer Tools ===
Xcode 5.0.2 (3335.32)
=== Xamarin.Mac ===
Xamarin.Mac: Not Installed
=== Xamarin.Android ===
Version: 4.10.2 (Indie Edition)
Android SDK: /Users/mm/Library/Developer/Xamarin/android-sdk-mac_x86
Supported Android versions:
2.1 (API level 7)
3.1 (API level 12)
4.3 (API level 18)
4.4 (API level 19)
Java SDK: /usr
java version "1.7.0_45"
Java(TM) SE Runtime Environment (build 1.7.0_45-b18)
Java HotSpot(TM) 64-Bit Server VM (build 24.45-b08, mixed mode)
=== Xamarin.iOS ===
Version: 126.96.36.199 (Indie Edition)
Build date: 2014-21-01 06:33:05-0500
=== Build Information ===
Release ID: 402020002
Git revision: c5f82958ae7d9af652b44b87ceff777b3ad19b91
Build date: 2013-11-19 15:35:40+0000
Xamarin addins: a4044fee09138f6fd031a9944b7caaeb51e57e80
=== Operating System ===
Mac OS X 10.9.2
Darwin Vics-MBP.local 13.1.0 Darwin Kernel Version 13.1.0
Thu Jan 16 19:40:37 PST 2014
Created attachment 5981 [details]
We have checked this on Device & simulator and observing same behavior.
It is showing Section Title screen correctly. Screencast for this:
Checked on device iPhone 5C.
Also could you please provide us the error details/screenshot for the same and which device you used?
XS 4.2.2 (build 2)
Sorry, I didn't mention that the error doesn't happens when the configuration is Debug.
It only happens on the device when the configuration is set to Release or Ad-Hoc. In the simulator it works on every configuration.
I've tested on two iPhone 5 (both A1428), one with 7.1 (beta 4-5), and one with 7.0.4.
In the test project (Release / Ad-Hoc), it just stays at the black 'Launch Image' (and it then returns to the springboard).
On real, more complex projects, it just pushes the uitableviewcontroller and then it just appears that the async method with optional param wasn't even called. In one project it doesn't even show the 'please wait" hud (BTProgressHUD) that's at the start of the async method... and in other project it doesn't show the activity indicator that is set as the uitableview footer when the async method starts...
Hope this info helps...
Let me know if you need any additional information.
We checked attached testprj with release configuration on device and getting errors as mentioned in comment 3.
Checked with device: iPhone 4 (iOS 7.0)
iOS Device Log: https://gist.github.com/saurabh360/4cbbe4cd192b027b0651
Crash Report: https://gist.github.com/AkhileshKumar01/c9559b4053374c523508
XS 4.2.2 (build 2)
This works once I disable LLVM in the release configuration.
Zoltan, can you have a look?
If you get an immediate startup crash, try to disable SGen (something seems to be broken in the latest mono version).
Should be fixed by mono 3f72288f578d4384c54066b878e2470be3ad886d/mt 06c31f622417d913ad013ee48423f7160fa9670c.
I can confirm this is fixed.
I have verified this fix with test project attached in comment 1. It has been tested in Release/Debug/Ad-Hoc configuration with enable and disable LLVM. It is working fine.
XS 4.2.4 (build 32)
Hence, Closing this issue.
Added comment for device, missing in comment8.
Test project has been tested with device iPhone-s.