error[E0214]: parenthesized type parameters may only be used with a `Fn` trait
  --> $DIR/E0214.rs:2:12
   |
LL |     let v: Vec(&str) = vec!["foo"];
   |            ^^^^^^^^^ only `Fn` traits may use parentheses
   |
help: use angle brackets instead
   |
LL |     let v: Vec<&str> = vec!["foo"];
   |               ~    ~

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0214`.