Invalid task ids used for expiration handlers.

[jaredsinclair]

The macro for beginning a background task looks like this:

UIBackgroundTaskIdentifier taskID = UIBackgroundTaskInvalid;
taskID = [[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler:^{
    [[UIApplication sharedApplication] endBackgroundTask:taskID]; 
}];

UIBackgroundTaskIdentifier is a value type, so when the block is created it captures taskID when it equals UIBackgroundTaskInvalid. It never captures the actual task identifier, so if the expiration handler pops the actual task isn't properly cancelled.

[garrettmoon]

Yup.

[garrettmoon]

@jaredsinclair Let me know what you think of #14

[jaredsinclair]

lg™