rust/src/test/ui/feature-gate-unsized_tuple_coercion.stderr

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error: Unsized tuple coercion is not stable enough for use and is subject to change (see issue #42877)
--> $DIR/feature-gate-unsized_tuple_coercion.rs:12:24
|
12 | let _ : &(Send,) = &((),);
| ^^^^^^
|
= help: add #![feature(unsized_tuple_coercion)] to the crate attributes to enable
error: aborting due to previous error