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error: return types are denoted using `->`
--> $DIR/avoid-ice-on-warning.rs:4:23
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LL | fn call_this<F>(f: F) : Fn(&str) + call_that {}
| ^
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help: use `->` instead
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LL - fn call_this<F>(f: F) : Fn(&str) + call_that {}
LL + fn call_this<F>(f: F) -> Fn(&str) + call_that {}
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error[E0405]: cannot find trait `call_that` in this scope
--> $DIR/avoid-ice-on-warning.rs:4:36
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LL | fn call_this<F>(f: F) : Fn(&str) + call_that {}
| ^^^^^^^^^ not found in this scope
error[E0782]: expected a type, found a trait
--> $DIR/avoid-ice-on-warning.rs:4:25
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LL | fn call_this<F>(f: F) : Fn(&str) + call_that {}
| ^^^^^^^^^^^^^^^^^^^^
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help: `Fn(&str) + call_that` is dyn-incompatible, use `impl Fn(&str) + call_that` to return an opaque type, as long as you return a single underlying type
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LL | fn call_this<F>(f: F) : impl Fn(&str) + call_that {}
| ++++
error: aborting due to 3 previous errors
Some errors have detailed explanations: E0405, E0782.
For more information about an error, try `rustc --explain E0405`.
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