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Prevent deadlock when the operation is being run on the main thread #82
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If an
SQKOperationis run on the main thread using[operation start]then there is a possibility of deadlock whendispatch_async(dispatch_get_main_queue(), ...)is used. This change checks the current queue and conditionally executes the merge block on the appropriate one.In production code this doesn't happen, since operations are usually run on a background queue. When running tests it is much more likely. This should fix some issues that break test runs.