"Unused instance variable" text / false positive

[iccir]

The following code gives a "Unused instance variable" warning. The instance variable is used, but it's never assigned and hence will always be nil.

Perhaps instead the warning should be "Instance variable _bar never assigned".

@implementation Foo {
    id _bar;
}

- (void) doSomethingWithBar
{
    [_bar doSomething];
}
@end

[iccir]

The above will now give a "Used but never assigned" warning.