error[E0433]: failed to resolve: could not find `xcrate` in the list of imported crates
  --> $DIR/non-existent-2.rs:4:15
   |
LL |     let s = ::xcrate::S;
   |               ^^^^^^ could not find `xcrate` in the list of imported crates

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0433`.