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Possible to pass [self anyFunction] in blocks without __weak object (iOS 5   ARC)
[UIView animateWithDuration:0.8 animations:^{
            //Do animationStuff
        } completion:^(BOOL finished) {
            [self anyFunction];
 }];

__weak MyClass *weakSelf = self;

[weakSelf anyFunction];

[object performBlock:^{
    [object performSomeAction]; // Will raise a warning
}];

[self performBlock:^{
    [self doSomething];    // Will raise a warning
}];

[self performBlock:^{
    [object doSomething];    // <-- No problem here
}];

__block __typeof__(self) bself = self;
[someObject doThingWithBlock:^(id result){
    bself.thingWhich = result;
}];