Does a singleton create retain cycle inside block?

I have a singleton and I want to capture it inside a block. I know that variables are retained inside a block because a constant copy of the objects passed is created and never deallocated unless using a weak instance of that object. The curiosity I have is whether the same behaviour is applied to a statically allocated variable. Here is my code (self is the sharedInstance of Class):

    + (Class *)sharedInstance
    {
        static Class *sharedInstance = nil;
        static dispatch_once_t onceToken;
        dispatch_once(&onceToken, ^{
            sharedInstance = [[Class alloc] init];
        });
        return sharedInstance;
    }

    [self setBlock:^(NSArray *array)
    {
        self.property = [array firstObject];
    }];