error[E0381]: use of possibly uninitialized variable: `x`
  --> $DIR/match-cfg-fake-edges.rs:23:13
   |
LL |             x;
   |             ^ use of possibly uninitialized `x`

error[E0382]: use of moved value: `x`
  --> $DIR/match-cfg-fake-edges.rs:37:13
   |
LL |     let x = String::new();
   |         - move occurs because `x` has type `std::string::String`, which does not implement the `Copy` trait
...
LL |         false if { drop(x); true } => 1,
   |                         - value moved here
LL |         true => {
LL |             x;
   |             ^ value used here after move

error[E0503]: cannot use `y.1` because it was mutably borrowed
  --> $DIR/match-cfg-fake-edges.rs:49:17
   |
LL |     let r = &mut y.1;
   |             -------- borrow of `y.1` occurs here
...
LL |         (false, true) => 1,
   |                 ^^^^ use of borrowed `y.1`
LL |         (true, _) => {
LL |             r;
   |             - borrow later used here

error: aborting due to 3 previous errors

Some errors have detailed explanations: E0381, E0382, E0503.
For more information about an error, try `rustc --explain E0381`.