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#![feature(generators, generator_trait)] use std::ops::Generator; use std::pin::Pin; fn main() { let _b = { let a = 3; Pin::new(&mut || yield &a).resume(()) //~^ ERROR: `a` does not live long enough }; let _b = { let a = 3; || { yield &a //~^ ERROR: `a` does not live long enough } }; }