error[E0004]: non-exhaustive patterns: `E::B` and `E::C` not covered
  --> $DIR/non-exhaustive-defined-here.rs:38:11
   |
LL |     match e1 {
   |           ^^ patterns `E::B` and `E::C` not covered
   |
note: `E` defined here
  --> $DIR/non-exhaustive-defined-here.rs:14:5
   |
LL | enum E {
   |      -
...
LL |     B,
   |     ^ not covered
...
LL |     C
   |     ^ not covered
   = note: the matched value is of type `E`
help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern, a match arm with multiple or-patterns as shown, or multiple match arms
   |
LL ~         E::A => {}
LL +         E::B | E::C => todo!()
   |

error[E0005]: refutable pattern in local binding: `E::B` and `E::C` not covered
  --> $DIR/non-exhaustive-defined-here.rs:44:9
   |
LL |     let E::A = e;
   |         ^^^^ patterns `E::B` and `E::C` not covered
   |
   = note: `let` bindings require an "irrefutable pattern", like a `struct` or an `enum` with only one variant
   = note: for more information, visit https://doc.rust-lang.org/book/ch18-02-refutability.html
note: `E` defined here
  --> $DIR/non-exhaustive-defined-here.rs:14:5
   |
LL | enum E {
   |      -
...
LL |     B,
   |     ^ not covered
...
LL |     C
   |     ^ not covered
   = note: the matched value is of type `E`
help: you might want to use `if let` to ignore the variants that aren't matched
   |
LL |     if let E::A = e { todo!() }
   |     ++              ~~~~~~~~~~~

error[E0004]: non-exhaustive patterns: `&E::B` and `&E::C` not covered
  --> $DIR/non-exhaustive-defined-here.rs:52:11
   |
LL |     match e {
   |           ^ patterns `&E::B` and `&E::C` not covered
   |
note: `E` defined here
  --> $DIR/non-exhaustive-defined-here.rs:14:5
   |
LL | enum E {
   |      -
...
LL |     B,
   |     ^ not covered
...
LL |     C
   |     ^ not covered
   = note: the matched value is of type `&E`
help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern, a match arm with multiple or-patterns as shown, or multiple match arms
   |
LL ~         E::A => {}
LL +         &E::B | &E::C => todo!()
   |

error[E0005]: refutable pattern in local binding: `&E::B` and `&E::C` not covered
  --> $DIR/non-exhaustive-defined-here.rs:58:9
   |
LL |     let E::A = e;
   |         ^^^^ patterns `&E::B` and `&E::C` not covered
   |
   = note: `let` bindings require an "irrefutable pattern", like a `struct` or an `enum` with only one variant
   = note: for more information, visit https://doc.rust-lang.org/book/ch18-02-refutability.html
note: `E` defined here
  --> $DIR/non-exhaustive-defined-here.rs:14:5
   |
LL | enum E {
   |      -
...
LL |     B,
   |     ^ not covered
...
LL |     C
   |     ^ not covered
   = note: the matched value is of type `&E`
help: you might want to use `if let` to ignore the variants that aren't matched
   |
LL |     if let E::A = e { todo!() }
   |     ++              ~~~~~~~~~~~

error[E0004]: non-exhaustive patterns: `&&mut &E::B` and `&&mut &E::C` not covered
  --> $DIR/non-exhaustive-defined-here.rs:66:11
   |
LL |     match e {
   |           ^ patterns `&&mut &E::B` and `&&mut &E::C` not covered
   |
note: `E` defined here
  --> $DIR/non-exhaustive-defined-here.rs:14:5
   |
LL | enum E {
   |      -
...
LL |     B,
   |     ^ not covered
...
LL |     C
   |     ^ not covered
   = note: the matched value is of type `&&mut &E`
help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern, a match arm with multiple or-patterns as shown, or multiple match arms
   |
LL ~         E::A => {}
LL +         &&mut &E::B | &&mut &E::C => todo!()
   |

error[E0005]: refutable pattern in local binding: `&&mut &E::B` and `&&mut &E::C` not covered
  --> $DIR/non-exhaustive-defined-here.rs:72:9
   |
LL |     let E::A = e;
   |         ^^^^ patterns `&&mut &E::B` and `&&mut &E::C` not covered
   |
   = note: `let` bindings require an "irrefutable pattern", like a `struct` or an `enum` with only one variant
   = note: for more information, visit https://doc.rust-lang.org/book/ch18-02-refutability.html
note: `E` defined here
  --> $DIR/non-exhaustive-defined-here.rs:14:5
   |
LL | enum E {
   |      -
...
LL |     B,
   |     ^ not covered
...
LL |     C
   |     ^ not covered
   = note: the matched value is of type `&&mut &E`
help: you might want to use `if let` to ignore the variants that aren't matched
   |
LL |     if let E::A = e { todo!() }
   |     ++              ~~~~~~~~~~~

error[E0004]: non-exhaustive patterns: `Opt::None` not covered
  --> $DIR/non-exhaustive-defined-here.rs:92:11
   |
LL |     match e {
   |           ^ pattern `Opt::None` not covered
   |
note: `Opt` defined here
  --> $DIR/non-exhaustive-defined-here.rs:84:5
   |
LL | enum Opt {
   |      ---
...
LL |     None,
   |     ^^^^ not covered
   = note: the matched value is of type `Opt`
help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern or an explicit pattern as shown
   |
LL ~         Opt::Some(ref _x) => {}
LL +         Opt::None => todo!()
   |

error[E0005]: refutable pattern in local binding: `Opt::None` not covered
  --> $DIR/non-exhaustive-defined-here.rs:98:9
   |
LL |     let Opt::Some(ref _x) = e;
   |         ^^^^^^^^^^^^^^^^^ pattern `Opt::None` not covered
   |
   = note: `let` bindings require an "irrefutable pattern", like a `struct` or an `enum` with only one variant
   = note: for more information, visit https://doc.rust-lang.org/book/ch18-02-refutability.html
note: `Opt` defined here
  --> $DIR/non-exhaustive-defined-here.rs:84:5
   |
LL | enum Opt {
   |      ---
...
LL |     None,
   |     ^^^^ not covered
   = note: the matched value is of type `Opt`
help: you might want to use `if let` to ignore the variant that isn't matched
   |
LL |     let _x = if let Opt::Some(ref _x) = e { _x } else { todo!() };
   |     +++++++++++                           +++++++++++++++++++++++
help: alternatively, you might want to use let else to handle the variant that isn't matched
   |
LL |     let Opt::Some(ref _x) = e else { todo!() };
   |                               ++++++++++++++++

error: aborting due to 8 previous errors

Some errors have detailed explanations: E0004, E0005.
For more information about an error, try `rustc --explain E0004`.