Bug 33449 - Passing null at NSNotificationCenter AddObserver
Summary: Passing null at NSNotificationCenter AddObserver
Status: RESOLVED FIXED
Alias: None
Product: iOS
Classification: Xamarin
Component: Xamarin.iOS.dll ()
Version: unspecified
Hardware: Macintosh Mac OS
: --- normal
Target Milestone: Untriaged
Assignee: Bugzilla
URL:
Depends on:
Blocks:
 
Reported: 2015-08-28 04:45 UTC by Sergey
Modified: 2015-08-28 08:39 UTC (History)
2 users (show)

Tags:
Is this bug a regression?: ---
Last known good build:

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Status:
RESOLVED FIXED

Description Sergey 2015-08-28 04:45:17 UTC
Passing null values for name, obj, queue, into a method:
public virtual NSObject AddObserver (string name, NSObject obj, NSOperationQueue queue, [BlockProxy (typeof(Trampolines.NIDActionArity1V18))] Action<NSNotification> handler);

cause ArgumentNullException.
But in apple documentation it should be possible: 
https://developer.apple.com/library/mac/documentation/Cocoa/Reference/Foundation/Classes/NSNotificationCenter_Class/#//apple_ref/occ/instm/NSNotificationCenter/addObserverForName:object:queue:usingBlock:
Comment 1 Sebastien Pouliot 2015-08-28 08:39:49 UTC
Thanks! Fixed in maccore/xcode7 3575cf2f9ca9a3577813c8393b6c26d05c75d8f0

Such errors should be less common in XI's future releases as Apple added
annotations in the Xcode7 SDK header files to specify where null is allowed (or
not).