merbla/gist:6c993af92e3c82b4f307

## gistfile1.md

      
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    ##Reproduction
###The issue is does not occur on the emulator

Create a new iOS project (iOS, Unified, Universal app)
Add Rx Components from Xamarin Store (2.2.1)
Add code such as

  var oddNumbers = Observable.Range (0, 10)
  	.Where (i => i % 2 == 0)
  	.Subscribe (
  		Console.WriteLine, 
  		() => Console.WriteLine ("Completed"));


Ensure deployment is targeting ARM64 or ARM7s or ARM7
Deploy to an ARM64 device
Run the app and should throw a similar exception to

System.InvalidOperationException: Disposable has already been assigned.
  at System.Reactive.Disposables.SingleAssignmentDisposable.set_Disposable (IDisposable value) [0x00000] in <filename unknown>:0

####Environment Details
Xamarin.Android
Version: 4.20.0.28 (Business Edition)
Android SDK: /Users/******/Library/Developer/Xamarin/android-sdk-mac_x86
	Supported Android versions:
		2.1   (API level 7)
		2.2   (API level 8)
		2.3   (API level 10)
		3.1   (API level 12)
		4.0   (API level 14)
		4.0.3 (API level 15)
Java SDK: /usr
java version "1.6.0_65"
Java(TM) SE Runtime Environment (build 1.6.0_65-b14-466.1-11M4716)
Java HotSpot(TM) 64-Bit Server VM (build 20.65-b04-466.1, mixed mode)

Apple Developer Tools
Xcode 6.0.1 (6528)
Build 6A317

Xamarin.iOS
Version: 8.4.0.47 (Business Edition)
Hash: 7244769
Branch: 
Build date: 2014-12-11 14:54:30-0500

Xamarin.Mac
Version:

Build Information
Release ID: 505040015
Git revision: f93940a35458a18052f1a25e106e62ca970d9c40
Build date: 2014-11-19 15:32:41-05
Xamarin addins: dc23cbd91a3a0e1d326328e1229e86c942a49ec8

Operating System
Mac OS X 10.10.1