error: closure returning async block can be made into an async closure
  --> $DIR/lint-closure-returning-async-block.rs:6:13
   |
LL |     let x = || async {};
   |             ^^ ----- this async block can be removed, and the closure can be turned into an async closure
   |
note: the lint level is defined here
  --> $DIR/lint-closure-returning-async-block.rs:3:9
   |
LL | #![deny(closure_returning_async_block)]
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
help: turn this into an async closure
   |
LL -     let x = || async {};
LL +     let x = async || {};
   |

error: closure returning async block can be made into an async closure
  --> $DIR/lint-closure-returning-async-block.rs:9:13
   |
LL |     let x = || async move {};
   |             ^^ ---------- this async block can be removed, and the closure can be turned into an async closure
   |
help: turn this into an async closure
   |
LL -     let x = || async move {};
LL +     let x = async || {};
   |

error: closure returning async block can be made into an async closure
  --> $DIR/lint-closure-returning-async-block.rs:12:13
   |
LL |     let x = move || async move {};
   |             ^^^^^^^ ---------- this async block can be removed, and the closure can be turned into an async closure
   |
help: turn this into an async closure
   |
LL -     let x = move || async move {};
LL +     let x = async move || {};
   |

error: closure returning async block can be made into an async closure
  --> $DIR/lint-closure-returning-async-block.rs:15:13
   |
LL |     let x = move || async {};
   |             ^^^^^^^ ----- this async block can be removed, and the closure can be turned into an async closure
   |
help: turn this into an async closure
   |
LL -     let x = move || async {};
LL +     let x = async move || {};
   |

error: closure returning async block can be made into an async closure
  --> $DIR/lint-closure-returning-async-block.rs:18:13
   |
LL |     let x = || {{ async {} }};
   |             ^^    ----- this async block can be removed, and the closure can be turned into an async closure
   |
help: turn this into an async closure
   |
LL -     let x = || {{ async {} }};
LL +     let x = async || {{ {} }};
   |

error: aborting due to 5 previous errors