error[E0282]: type annotations needed --> $DIR/issue-25368.rs:21:17 | LL | let (tx, rx) = channel(); | -------- consider giving the pattern a type ... LL | tx.send(Foo{ foo: PhantomData }); //~ ERROR E0282 | ^^^ cannot infer type for `T` error: aborting due to previous error For more information about this error, try `rustc --explain E0282`.