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error[E0308]: mismatched types
--> $DIR/issue-90014-tait2.rs:27:9
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LL | fn make_fut(&self) -> Box<dyn for<'a> Trait<'a, Thing = Fut<'a>>> {
| ------------------------------------------- expected `Box<(dyn for<'a> Trait<'a, Thing = Fut<'a>> + 'static)>` because of return type
LL | Box::new((async { () },))
| ^^^^^^^^^^^^^^^^^^^^^^^^^ expected `Box<dyn Trait<'a, Thing = Fut<'_>>>`, found `Box<(...,)>`
|
= note: expected struct `Box<(dyn for<'a> Trait<'a, Thing = Fut<'a>> + 'static)>`
found struct `Box<({async block@$DIR/issue-90014-tait2.rs:27:19: 27:31},)>`
= help: `({async block@$DIR/issue-90014-tait2.rs:27:19: 27:31},)` implements `Trait` so you could box the found value and coerce it to the trait object `Box<dyn Trait>`, you will have to change the expected type as well
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0308`.
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