error: unnecessary parentheses around pattern
  --> $DIR/issue-54538-unused-parens-lint.rs:16:9
   |
LL |     let (a) = 0;
   |         ^^^ help: remove these parentheses
   |
note: the lint level is defined here
  --> $DIR/issue-54538-unused-parens-lint.rs:13:9
   |
LL | #![deny(unused_parens)]
   |         ^^^^^^^^^^^^^

error: unnecessary parentheses around pattern
  --> $DIR/issue-54538-unused-parens-lint.rs:17:9
   |
LL |     for (a) in 0..1 {}
   |         ^^^ help: remove these parentheses

error: unnecessary parentheses around pattern
  --> $DIR/issue-54538-unused-parens-lint.rs:18:12
   |
LL |     if let (a) = 0 {}
   |            ^^^ help: remove these parentheses

error: unnecessary parentheses around pattern
  --> $DIR/issue-54538-unused-parens-lint.rs:19:15
   |
LL |     while let (a) = 0 {}
   |               ^^^ help: remove these parentheses

error: unnecessary parentheses around pattern
  --> $DIR/issue-54538-unused-parens-lint.rs:20:12
   |
LL |     fn foo((a): u8) {}
   |            ^^^ help: remove these parentheses

error: unnecessary parentheses around pattern
  --> $DIR/issue-54538-unused-parens-lint.rs:21:14
   |
LL |     let _ = |(a): u8| 0;
   |              ^^^ help: remove these parentheses

error: unnecessary parentheses around pattern
  --> $DIR/issue-54538-unused-parens-lint.rs:49:12
   |
LL |     if let (0 | 1) = 0 {}
   |            ^^^^^^^ help: remove these parentheses

error: unnecessary parentheses around pattern
  --> $DIR/issue-54538-unused-parens-lint.rs:50:13
   |
LL |     if let ((0 | 1),) = (0,) {}
   |             ^^^^^^^ help: remove these parentheses

error: unnecessary parentheses around pattern
  --> $DIR/issue-54538-unused-parens-lint.rs:51:13
   |
LL |     if let [(0 | 1)] = [0] {}
   |             ^^^^^^^ help: remove these parentheses

error: unnecessary parentheses around pattern
  --> $DIR/issue-54538-unused-parens-lint.rs:52:16
   |
LL |     if let 0 | (1 | 2) = 0 {}
   |                ^^^^^^^ help: remove these parentheses

error: unnecessary parentheses around pattern
  --> $DIR/issue-54538-unused-parens-lint.rs:54:15
   |
LL |     if let TS((0 | 1)) = TS(0) {}
   |               ^^^^^^^ help: remove these parentheses

error: unnecessary parentheses around pattern
  --> $DIR/issue-54538-unused-parens-lint.rs:56:20
   |
LL |     if let NS { f: (0 | 1) } = (NS { f: 0 }) {}
   |                    ^^^^^^^ help: remove these parentheses

error: unnecessary parentheses around pattern
  --> $DIR/issue-54538-unused-parens-lint.rs:66:9
   |
LL |         (_) => {}
   |         ^^^ help: remove these parentheses

error: unnecessary parentheses around pattern
  --> $DIR/issue-54538-unused-parens-lint.rs:67:9
   |
LL |         (y) => {}
   |         ^^^ help: remove these parentheses

error: unnecessary parentheses around pattern
  --> $DIR/issue-54538-unused-parens-lint.rs:68:9
   |
LL |         (ref r) => {}
   |         ^^^^^^^ help: remove these parentheses

error: unnecessary parentheses around pattern
  --> $DIR/issue-54538-unused-parens-lint.rs:69:9
   |
LL |         (e @ 1...2) => {}
   |         ^^^^^^^^^^^ help: remove these parentheses

error: unnecessary parentheses around pattern
  --> $DIR/issue-54538-unused-parens-lint.rs:75:9
   |
LL |         (e @ &(1...2)) => {}
   |         ^^^^^^^^^^^^^^ help: remove these parentheses

error: unnecessary parentheses around pattern
  --> $DIR/issue-54538-unused-parens-lint.rs:76:10
   |
LL |         &(_) => {}
   |          ^^^ help: remove these parentheses

error: unnecessary parentheses around pattern
  --> $DIR/issue-54538-unused-parens-lint.rs:87:9
   |
LL |         (_) => {}
   |         ^^^ help: remove these parentheses

error: unnecessary parentheses around pattern
  --> $DIR/issue-54538-unused-parens-lint.rs:88:9
   |
LL |         (y) => {}
   |         ^^^ help: remove these parentheses

error: unnecessary parentheses around pattern
  --> $DIR/issue-54538-unused-parens-lint.rs:89:9
   |
LL |         (ref r) => {}
   |         ^^^^^^^ help: remove these parentheses

error: unnecessary parentheses around pattern
  --> $DIR/issue-54538-unused-parens-lint.rs:90:9
   |
LL |         (e @ 1..=2) => {}
   |         ^^^^^^^^^^^ help: remove these parentheses

error: unnecessary parentheses around pattern
  --> $DIR/issue-54538-unused-parens-lint.rs:96:9
   |
LL |         (e @ &(1..=2)) => {}
   |         ^^^^^^^^^^^^^^ help: remove these parentheses

error: unnecessary parentheses around pattern
  --> $DIR/issue-54538-unused-parens-lint.rs:97:10
   |
LL |         &(_) => {}
   |          ^^^ help: remove these parentheses

error: aborting due to 24 previous errors