error[E0308]: mismatched types --> $DIR/generator-desc.rs:10:19 | LL | fun(async {}, async {}); | --- -------- ^^^^^^^^ expected `async` block, found a different `async` block | | | | | the expected `async` block | arguments to this function are incorrect | = note: expected `async` block `[async block@$DIR/generator-desc.rs:10:9: 10:17]` found `async` block `[async block@$DIR/generator-desc.rs:10:19: 10:27]` note: function defined here --> $DIR/generator-desc.rs:8:4 | LL | fn fun>(f1: F, f2: F) {} | ^^^ ----- error[E0308]: mismatched types --> $DIR/generator-desc.rs:12:16 | LL | fun(one(), two()); | --- ^^^^^ expected future, found a different future | | | arguments to this function are incorrect | = help: consider `await`ing on both `Future`s = note: distinct uses of `impl Trait` result in different opaque types note: function defined here --> $DIR/generator-desc.rs:8:4 | LL | fn fun>(f1: F, f2: F) {} | ^^^ ----- error[E0308]: mismatched types --> $DIR/generator-desc.rs:14:26 | LL | fun((async || {})(), (async || {})()); | --- -- ^^^^^^^^^^^^^^^ expected `async` closure body, found a different `async` closure body | | | | | the expected `async` closure body | arguments to this function are incorrect | = note: expected `async` closure body `[async closure body@$DIR/generator-desc.rs:14:19: 14:21]` found `async` closure body `[async closure body@$DIR/generator-desc.rs:14:36: 14:38]` note: function defined here --> $DIR/generator-desc.rs:8:4 | LL | fn fun>(f1: F, f2: F) {} | ^^^ ----- error: aborting due to 3 previous errors For more information about this error, try `rustc --explain E0308`.