error[E0277]: the size for values of type `T` cannot be known at compilation time --> $DIR/unsized-bare-typaram.rs:2:29 | LL | fn foo() { bar::() } | - ^ doesn't have a size known at compile-time | | | this type parameter needs to be `std::marker::Sized` | note: required by a bound in `bar` --> $DIR/unsized-bare-typaram.rs:1:8 | LL | fn bar() { } | ^ required by this bound in `bar` help: consider removing the `?Sized` bound to make the type parameter `Sized` | LL - fn foo() { bar::() } LL + fn foo() { bar::() } | error: aborting due to previous error For more information about this error, try `rustc --explain E0277`.