error[E0416]: identifier `a` is bound more than once in the same pattern
  --> $DIR/already-bound-name.rs:12:13
   |
LL |     let (a, a) = (0, 1); // Standard duplication without an or-pattern.
   |             ^ used in a pattern more than once

error[E0416]: identifier `a` is bound more than once in the same pattern
  --> $DIR/already-bound-name.rs:15:15
   |
LL |     let (a, A(a, _) | B(a)) = (0, A(1, 2));
   |               ^ used in a pattern more than once

error[E0416]: identifier `a` is bound more than once in the same pattern
  --> $DIR/already-bound-name.rs:15:25
   |
LL |     let (a, A(a, _) | B(a)) = (0, A(1, 2));
   |                         ^ used in a pattern more than once

error[E0416]: identifier `a` is bound more than once in the same pattern
  --> $DIR/already-bound-name.rs:19:26
   |
LL |     let (A(a, _) | B(a), a) = (A(0, 1), 2);
   |                          ^ used in a pattern more than once

error[E0416]: identifier `a` is bound more than once in the same pattern
  --> $DIR/already-bound-name.rs:22:14
   |
LL |     let A(a, a) | B(a) = A(0, 1);
   |              ^ used in a pattern more than once

error[E0416]: identifier `a` is bound more than once in the same pattern
  --> $DIR/already-bound-name.rs:25:21
   |
LL |     let B(a) | A(a, a) = A(0, 1);
   |                     ^ used in a pattern more than once

error[E0416]: identifier `a` is bound more than once in the same pattern
  --> $DIR/already-bound-name.rs:29:21
   |
LL |         B(a) | A(a, a) => {} // Let's ensure `match` has no funny business.
   |                     ^ used in a pattern more than once

error[E0416]: identifier `a` is bound more than once in the same pattern
  --> $DIR/already-bound-name.rs:33:36
   |
LL |     let B(A(a, _) | B(a)) | A(a, A(a, _) | B(a)) = B(B(1));
   |                                    ^ used in a pattern more than once

error[E0416]: identifier `a` is bound more than once in the same pattern
  --> $DIR/already-bound-name.rs:33:46
   |
LL |     let B(A(a, _) | B(a)) | A(a, A(a, _) | B(a)) = B(B(1));
   |                                              ^ used in a pattern more than once

error[E0416]: identifier `a` is bound more than once in the same pattern
  --> $DIR/already-bound-name.rs:38:36
   |
LL |     let B(_) | A(A(a, _) | B(a), A(a, _) | B(a)) = B(B(1));
   |                                    ^ used in a pattern more than once

error[E0416]: identifier `a` is bound more than once in the same pattern
  --> $DIR/already-bound-name.rs:38:46
   |
LL |     let B(_) | A(A(a, _) | B(a), A(a, _) | B(a)) = B(B(1));
   |                                              ^ used in a pattern more than once

error[E0408]: variable `a` is not bound in all patterns
  --> $DIR/already-bound-name.rs:38:9
   |
LL |     let B(_) | A(A(a, _) | B(a), A(a, _) | B(a)) = B(B(1));
   |         ^^^^ pattern doesn't bind `a`        - variable not in all patterns

error[E0416]: identifier `a` is bound more than once in the same pattern
  --> $DIR/already-bound-name.rs:43:49
   |
LL |     let B(A(a, _) | B(a)) | A(A(a, _) | B(a), A(a, _) | B(a)) = B(B(1));
   |                                                 ^ used in a pattern more than once

error[E0416]: identifier `a` is bound more than once in the same pattern
  --> $DIR/already-bound-name.rs:43:59
   |
LL |     let B(A(a, _) | B(a)) | A(A(a, _) | B(a), A(a, _) | B(a)) = B(B(1));
   |                                                           ^ used in a pattern more than once

warning: the feature `or_patterns` is incomplete and may cause the compiler to crash
  --> $DIR/already-bound-name.rs:4:12
   |
LL | #![feature(or_patterns)]
   |            ^^^^^^^^^^^
   |
   = note: `#[warn(incomplete_features)]` on by default

error[E0308]: mismatched types
  --> $DIR/already-bound-name.rs:33:31
   |
LL |     let B(A(a, _) | B(a)) | A(a, A(a, _) | B(a)) = B(B(1));
   |                               ^ expected integer, found enum `E`
   |
   = note: expected type `{integer}`
              found type `E<{integer}>`

error: aborting due to 15 previous errors

Some errors have detailed explanations: E0308, E0408, E0416.
For more information about an error, try `rustc --explain E0308`.