| error[E0308]: mismatched types | |
| --> $DIR/issue-15896.rs:11:11 | |
| | | |
| LL | let u = match e { | |
| | - this expression has type `E` | |
| LL | E::B( | |
| LL | Tau{t: x}, | |
| | ^^^^^^^^^ expected `R`, found `Tau` | |
| error: aborting due to 1 previous error | |
| For more information about this error, try `rustc --explain E0308`. |