error[E0369]: cannot multiply `Vec<isize>` by `{integer}` --> $DIR/pattern-tyvar-2.rs:3:71 | LL | fn foo(t: Bar) -> isize { match t { Bar::T1(_, Some(x)) => { return x * 3; } _ => { panic!(); } } } | - ^ - {integer} | | | Vec<isize> error: aborting due to previous error For more information about this error, try `rustc --explain E0369`.