error[E0503]: cannot use `y` because it was mutably borrowed --> $DIR/borrowck-anon-fields-variant.rs:16:19 | LL | Foo::Y(ref mut a, _) => a, | --------- `y.0` is borrowed here ... LL | let b = match y { | ^ use of borrowed `y.0` ... LL | *a += 1; | ------- borrow later used here error[E0503]: cannot use `y` because it was mutably borrowed --> $DIR/borrowck-anon-fields-variant.rs:34:19 | LL | Foo::Y(ref mut a, _) => a, | --------- `y.0` is borrowed here ... LL | let b = match y { | ^ use of borrowed `y.0` ... LL | *a += 1; | ------- borrow later used here error[E0499]: cannot borrow `y.0` as mutable more than once at a time --> $DIR/borrowck-anon-fields-variant.rs:36:14 | LL | Foo::Y(ref mut a, _) => a, | --------- first mutable borrow occurs here ... LL | Foo::Y(ref mut b, _) => b, | ^^^^^^^^^ second mutable borrow occurs here ... LL | *a += 1; | ------- first borrow later used here error: aborting due to 3 previous errors Some errors have detailed explanations: E0499, E0503. For more information about an error, try `rustc --explain E0499`.