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error[E0425]: cannot find value `_y` in this scope
  --> $DIR/issue-105946.rs:6:10
   |
LL |     let [_y..] = [Box::new(1), Box::new(2)];
   |          ^^ not found in this scope
   |
help: if you meant to collect the rest of the slice in `_y`, use the at operator
   |
LL |     let [_y @ ..] = [Box::new(1), Box::new(2)];
   |             +

error[E0658]: `X..` patterns in slices are experimental
  --> $DIR/issue-105946.rs:6:10
   |
LL |     let [_y..] = [Box::new(1), Box::new(2)];
   |          ^^^^
   |
   = note: see issue #67264 <https://github.com/rust-lang/rust/issues/67264> for more information
   = help: add `#![feature(half_open_range_patterns_in_slices)]` to the crate attributes to enable

error[E0308]: mismatched types
  --> $DIR/issue-105946.rs:2:12
   |
LL |     return {};
   |            ^^ expected `str`, found `()`

error[E0527]: pattern requires 1 element but array has 2
  --> $DIR/issue-105946.rs:6:9
   |
LL |     let [_y..] = [Box::new(1), Box::new(2)];
   |         ^^^^^^ expected 2 elements

error: aborting due to 4 previous errors

Some errors have detailed explanations: E0308, E0425, E0527, E0658.
For more information about an error, try `rustc --explain E0308`.