error[E0493]: destructor of `Option>` cannot be evaluated at compile-time --> $DIR/drop-fail.rs:8:9 | LL | let x = Some(Vec::new()); | ^ the destructor for this type cannot be evaluated in constants ... LL | }; | - value is dropped here error[E0493]: destructor of `(Vec,)` cannot be evaluated at compile-time --> $DIR/drop-fail.rs:21:9 | LL | let vec_tuple = (Vec::new(),); | ^^^^^^^^^ the destructor for this type cannot be evaluated in constants ... LL | }; | - value is dropped here error[E0493]: destructor of `Result, Vec>` cannot be evaluated at compile-time --> $DIR/drop-fail.rs:29:9 | LL | let x: Result<_, Vec> = Ok(Vec::new()); | ^ the destructor for this type cannot be evaluated in constants ... LL | }; | - value is dropped here error[E0493]: destructor of `Option>` cannot be evaluated at compile-time --> $DIR/drop-fail.rs:39:9 | LL | let mut tmp = None; | ^^^^^^^ the destructor for this type cannot be evaluated in constants ... LL | }; | - value is dropped here error: aborting due to 4 previous errors For more information about this error, try `rustc --explain E0493`.