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[self.foo setBlock:^{
[self doSomething]; // causes warning
}];
versus
[self.foo setBlock:^{
self.bar = baz; // does not cause warning
}];
The warning being “Capturing self strongly in this block is likely to lead to a retain cycle.”
Don’t both lead to a strong reference?
This is a compiler bug and you should file a bug report with Apple.
Both are the same,
a.b = cis just a different way for writing[a setB: c]. If the compiler handles one differently from the other this is a bug.