[bug #59204] NSOperationQueue leak

[Richard Frith-Macdonald]

Update of bug #59204 (project gnustep):

             Open/Closed:                    Open => Analyzed               

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Follow-up Comment #6:

Having investigated, I think your problem is not a leak, but one of timing.

Your testcase waits for the operation to complete, but completion of an
operation takes place *before* the operation is released/deallocated.  So
completion of the operation in its thread can wake the main thread (which
prints the retain count) before the object retain count is decremented giving
the impression of a leak where none exists.
You can check this by adding a short delay to allow the other thread to
release the object
eg.
   [NSThread sleepForTimeInterval: 0.1];
between calling -test and printing the retain count.

While looking at this, I did notice that if the operation autoreleases objects
they will be caught by the outer autorelease pool of the thread and may
persist until the thread ends.  So I changed the code in trunk to wrap
execution of each individual operation in its own pool.

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