error[E0282]: type annotations needed --> $DIR/issue-25368.rs:11:27 | LL | tx.send(Foo{ foo: PhantomData }); | ^^^^^^^^^^^ cannot infer type of the type parameter `T` declared on the struct `PhantomData` | help: consider specifying the generic argument | LL | tx.send(Foo{ foo: PhantomData:: }); | +++++ error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0282`.