[Mono-bugs] [Bug 688019] New: GC does not collect UIViewController in certain cases (Case 2)

[bugzilla_noreply at novell.com]

https://bugzilla.novell.com/show_bug.cgi?id=688019

https://bugzilla.novell.com/show_bug.cgi?id=688019#c0


           Summary: GC does not collect UIViewController in certain cases
                    (Case 2)
    Classification: Mono
           Product: MonoTouch
           Version: unspecified
          Platform: iPhone
        OS/Version: Apple iOS 4.2
            Status: NEW
          Severity: Critical
          Priority: P5 - None
         Component: Runtime
        AssignedTo: gnorton at novell.com
        ReportedBy: azmy at ebseg.com
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---
           Blocker: ---


User-Agent:       Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0) Gecko/20100101
Firefox/4.0

GC does not collect UIViewController in certain cases (Case 2)
1) When UIViewController adds a UIButton to a Navigation Bar View with Event
inside the UIViewController 
2) this happens even if you try to remove the Event Handler using -= method on
the event handler


Reproducible: Always

Steps to Reproduce:
1. Create aUIViewController 
2. Push a UIViewController into thos Navigation Bar
3. Have the UIViewController  add a UIButton in the View of the
UIViewController 
4. Add Event to the UIButton inside UIViewController 
4. Set the UIViewController to null 
5. the UIViewController destruct-er  is never called
6. This happens even if you remove the Event Handler using -= approach 
is called normally and GC Collection is fine 
Actual Results:  
Memory for the UIViewController is never released causing memory leaks and
frequent application kill by iOS 

Expected Results:  
GC Collection should occur when Event Handler is removed  (and even better GC
should occur even if Event Handler is not manually removed)

Monotouch 4.0

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