__NSObserver should offer a DebugDescription explaining what it captures

Originator:marcelofabri.mf
Number:rdar://33106592 Date Originated:03-Jul-2017 04:22 PM
Status:Open Resolved:
Product:iOS + SDK Product Version:Xcode 9b2
Classification:Other Bug Reproducible:Always
 
Summary:
This is a duplicate of radar #33104144

I’m hunting down a retain cycle based on some blocks that strongly maintain my object and __NSObserver is in the middle. Unfortunately there’s zero debug output in there. I can use _ivarDescription but not everyone will know that trick and it takes extra time. This object should have a nice description (or at least a debugDescription) telling me what it maintains.


Steps to Reproduce:
Any code that uses the self addObserverForName:notificationName object:object queue:queue usingBlock:^(NSNotification *note) API on NSNotificationCenter.

Expected Results:
Internal management object should be more descriptive.

Actual Results:
Internal management object only prints it’s pointer.

Version:
Xcode 9b2

Notes:
No sample needed, open the source for __NSObserver and see that description is simply not implemented.

Screenshot: https://twitter.com/steipete/status/881813334936432641

Comments


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