| $ cargo run |
| Compiling cons-list v0.1.0 (file:///projects/cons-list) |
| error[E0072]: recursive type `List` has infinite size |
| --> src/main.rs:1:1 |
| | |
| 1 | enum List { |
| | ^^^^^^^^^ recursive type has infinite size |
| 2 | Cons(i32, List), |
| | ---- recursive without indirection |
| | |
| help: insert some indirection (e.g., a `Box`, `Rc`, or `&`) to make `List` representable |
| | |
| 2 | Cons(i32, Box<List>), |
| | ++++ + |
| |
| error[E0391]: cycle detected when computing drop-check constraints for `List` |
| --> src/main.rs:1:1 |
| | |
| 1 | enum List { |
| | ^^^^^^^^^ |
| | |
| = note: ...which immediately requires computing drop-check constraints for `List` again |
| = note: cycle used when computing dropck types for `Canonical { max_universe: U0, variables: [], value: ParamEnvAnd { param_env: ParamEnv { caller_bounds: [], reveal: UserFacing, constness: NotConst }, value: List } }` |
| |
| Some errors have detailed explanations: E0072, E0391. |
| For more information about an error, try `rustc --explain E0072`. |
| error: could not compile `cons-list` due to 2 previous errors |
