error: unexpected parentheses surrounding `match` arm pattern
  --> $DIR/feature-gate-guard-patterns.rs:10:9
   |
LL |         (0 if guard(0)) => {},
   |         ^             ^
   |
help: remove parentheses surrounding the pattern
   |
LL -         (0 if guard(0)) => {},
LL +         0 if guard(0) => {},
   |

error[E0425]: cannot find value `x` in this scope
  --> $DIR/feature-gate-guard-patterns.rs:21:22
   |
LL |     let ((x if guard(x)) | x) = 0;
   |                      ^ not found in this scope

error[E0425]: cannot find value `x` in this scope
  --> $DIR/feature-gate-guard-patterns.rs:38:45
   |
LL | fn even_as_function_parameters(((x if guard(x), _) | (_, x)): (i32, i32)) {}
   |                                             ^
   |
help: the binding `x` is available in a different scope in the same function
  --> $DIR/feature-gate-guard-patterns.rs:21:11
   |
LL |     let ((x if guard(x)) | x) = 0;
   |           ^

error[E0658]: guard patterns are experimental
  --> $DIR/feature-gate-guard-patterns.rs:16:15
   |
LL |         (0 if guard(0)) | 1 => {},
   |               ^^^^^^^^
   |
   = note: see issue #129967 <https://github.com/rust-lang/rust/issues/129967> for more information
   = help: add `#![feature(guard_patterns)]` to the crate attributes to enable
   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
   = help: consider using match arm guards

error[E0658]: guard patterns are experimental
  --> $DIR/feature-gate-guard-patterns.rs:21:16
   |
LL |     let ((x if guard(x)) | x) = 0;
   |                ^^^^^^^^
   |
   = note: see issue #129967 <https://github.com/rust-lang/rust/issues/129967> for more information
   = help: add `#![feature(guard_patterns)]` to the crate attributes to enable
   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
   = help: consider using match arm guards

error[E0658]: guard patterns are experimental
  --> $DIR/feature-gate-guard-patterns.rs:25:18
   |
LL |     if let (x if guard(x)) = 0 {}
   |                  ^^^^^^^^
   |
   = note: see issue #129967 <https://github.com/rust-lang/rust/issues/129967> for more information
   = help: add `#![feature(guard_patterns)]` to the crate attributes to enable
   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
   = help: consider using match arm guards

error[E0658]: guard patterns are experimental
  --> $DIR/feature-gate-guard-patterns.rs:29:21
   |
LL |     while let (x if guard(x)) = 0 {}
   |                     ^^^^^^^^
   |
   = note: see issue #129967 <https://github.com/rust-lang/rust/issues/129967> for more information
   = help: add `#![feature(guard_patterns)]` to the crate attributes to enable
   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
   = help: consider using match arm guards

error[E0658]: guard patterns are experimental
  --> $DIR/feature-gate-guard-patterns.rs:34:21
   |
LL |     while let (x if guard(x)) = 0 {}
   |                     ^^^^^^^^
   |
   = note: see issue #129967 <https://github.com/rust-lang/rust/issues/129967> for more information
   = help: add `#![feature(guard_patterns)]` to the crate attributes to enable
   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
   = help: consider using match arm guards

error[E0658]: guard patterns are experimental
  --> $DIR/feature-gate-guard-patterns.rs:38:39
   |
LL | fn even_as_function_parameters(((x if guard(x), _) | (_, x)): (i32, i32)) {}
   |                                       ^^^^^^^^
   |
   = note: see issue #129967 <https://github.com/rust-lang/rust/issues/129967> for more information
   = help: add `#![feature(guard_patterns)]` to the crate attributes to enable
   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
   = help: consider using match arm guards

warning: irrefutable `if let` pattern
  --> $DIR/feature-gate-guard-patterns.rs:25:8
   |
LL |     if let (x if guard(x)) = 0 {}
   |        ^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: this pattern will always match, so the `if let` is useless
   = help: consider replacing the `if let` with a `let`
   = note: `#[warn(irrefutable_let_patterns)]` on by default

warning: irrefutable `while let` pattern
  --> $DIR/feature-gate-guard-patterns.rs:29:11
   |
LL |     while let (x if guard(x)) = 0 {}
   |           ^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: this pattern will always match, so the loop will never exit
   = help: consider instead using a `loop { ... }` with a `let` inside it

error: aborting due to 9 previous errors; 2 warnings emitted

Some errors have detailed explanations: E0425, E0658.
For more information about an error, try `rustc --explain E0425`.