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error[E0271]: type mismatch resolving `<Result<..., ()> as Future>::Error == Foo`
╭▸ $DIR/E0271.rs:19:5
│
LL │ ┏ Box::new(
LL │ ┃ Ok::<_, ()>(
LL │ ┃ Err::<(), _>(
LL │ ┃ Ok::<_, ()>(
‡ ┃
LL │ ┃ )
│ ┗━━━━━┛ type mismatch resolving `<Result<..., ()> as Future>::Error == Foo`
╰╴
note: expected this to be `Foo`
╭▸ $DIR/E0271.rs:9:18
│
LL │ type Error = E;
│ ━
├ note: required for the cast from `Box<Result<..., ()>>` to `Box<...>`
├ note: the full name for the type has been written to '$TEST_BUILD_DIR/E0271.long-type-$LONG_TYPE_HASH.txt'
╰ note: consider using `--verbose` to print the full type name to the console
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0271`.
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