error[E0382]: use of partially moved value: `s`
  --> $DIR/move-in-pattern-mut.rs:18:9
   |
LL |     if let Some(mut x) = s {
   |                 ----- value partially moved here
...
LL |     foo(s);
   |         ^ value used here after partial move
   |
   = note: partial move occurs because value has type `S`, which does not implement the `Copy` trait
help: borrow this binding in the pattern to avoid moving the value
   |
LL |     if let Some(ref mut x) = s {
   |                 +++

error[E0382]: use of partially moved value: `e`
  --> $DIR/move-in-pattern-mut.rs:22:9
   |
LL |     let E::V { s: mut x } = e;
   |                   ----- value partially moved here
LL |     x = S;
LL |     bar(e);
   |         ^ value used here after partial move
   |
   = note: partial move occurs because value has type `S`, which does not implement the `Copy` trait
help: borrow this binding in the pattern to avoid moving the value
   |
LL |     let E::V { s: ref mut x } = e;
   |                   +++

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0382`.