dispatch_async to queues other than main queue leaks memory in iOS 9.2

Originator:onevcat
Number:rdar://23894846 Date Originated:2015/12/15
Status:Closed Resolved:No
Product:iOS Product Version:9.2
Classification:iOS SDK Reproducible:Always
 
Summary:
dispatch_async to a queue other than the main queue leaks memory. It only appears in iOS 9.2. It works perfect in other iOS versions. So I guess it is a regression of iOS 9.2

Steps to Reproduce:
Open and run the project here: https://github.com/onevcat/DispatchMemoryLeakDemo

Expected Results:
The demo runs without problem. Memory does not increase unbounded.

Actual Results:
The memory increases until the app crashes in iOS 9.2 devices. On other iOS versions or even iOS simulator with 9.2, memory keeps reasonable.

Version:
9.2(13C75)

Notes:
You can find a demo here https://github.com/onevcat/DispatchMemoryLeakDemo

Configuration:
iPhone 6 Plus/iPhone 6

Comments

Thanks for reply. It turns out to be a problem of Xcode debug session instead. Turning off the "Queue Debugging" option in scheme setting would stop it. https://github.com/onevcat/DispatchMemoryLeakDemo/issues/2

By onevcat at Dec. 17, 2015, 1:44 a.m. (reply...)

Just want to mention, you cannot catch the memory increasing in Instrument. You can only see it in Xcode debug panel.

By onevcat at Dec. 15, 2015, 3:42 a.m. (reply...)

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