error[E0004]: non-exhaustive patterns: `B` not covered
  --> $DIR/non-exhaustive-match.rs:26:25
   |
LL | enum L1 { A, B }
   | ----------------
   | |            |
   | |            not covered
   | `L1` defined here
...
LL |     let _b = || { match l1 { L1::A => () } };
   |                         ^^ pattern `B` not covered
   |
   = note: the matched value is of type `L1`
help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
   |
LL |     let _b = || { match l1 { L1::A => (), B => todo!() } };
   |                                         ++++++++++++++

error[E0004]: non-exhaustive patterns: type `E1` is non-empty
  --> $DIR/non-exhaustive-match.rs:37:25
   |
LL |     let _d = || { match e1 {} };
   |                         ^^
   |
   = note: the matched value is of type `E1`, which is marked as non-exhaustive
help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms
   |
LL ~     let _d = || { match e1 {
LL +         _ => todo!(),
LL ~     } };
   |

error[E0004]: non-exhaustive patterns: `_` not covered
  --> $DIR/non-exhaustive-match.rs:39:25
   |
LL |     let _e = || { match e2 { E2::A => (), E2::B => () } };
   |                         ^^ pattern `_` not covered
   |
   = note: the matched value is of type `E2`, which is marked as non-exhaustive
   = help: ensure that all possible cases are being handled, possibly by adding wildcards or more match arms

error[E0505]: cannot move out of `e3` because it is borrowed
  --> $DIR/non-exhaustive-match.rs:46:22
   |
LL |     let _g = || { match e3 { E3::C => (), _ => () }  };
   |              --         -- borrow occurs due to use in closure
   |              |
   |              borrow of `e3` occurs here
LL |     let mut mut_e3 = e3;
   |                      ^^ move out of `e3` occurs here
LL |
LL |     _g();
   |     -- borrow later used here

error: aborting due to 4 previous errors

Some errors have detailed explanations: E0004, E0505.
For more information about an error, try `rustc --explain E0004`.