| error[E0412]: cannot find type `Undefined` in this scope | |
| --> $DIR/issue-18058.rs:1:6 | |
| | | |
| LL | impl Undefined {} | |
| | ^^^^^^^^^ not found in this scope | |
| error: aborting due to previous error | |
| For more information about this error, try `rustc --explain E0412`. |