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error: unused implementer of `Iterator` that must be used
--> $DIR/must_use-in-stdlib-traits.rs:42:4
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LL | iterator();
| ^^^^^^^^^^^
|
= note: iterators are lazy and do nothing unless consumed
note: the lint level is defined here
--> $DIR/must_use-in-stdlib-traits.rs:1:9
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LL | #![deny(unused_must_use)]
| ^^^^^^^^^^^^^^^
error: unused implementer of `Future` that must be used
--> $DIR/must_use-in-stdlib-traits.rs:43:4
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LL | future();
| ^^^^^^^^^
|
= note: futures do nothing unless you `.await` or poll them
error: unused implementer of `FnOnce` that must be used
--> $DIR/must_use-in-stdlib-traits.rs:44:4
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LL | square_fn_once();
| ^^^^^^^^^^^^^^^^^
|
= note: closures are lazy and do nothing unless called
error: unused implementer of `FnMut` that must be used
--> $DIR/must_use-in-stdlib-traits.rs:45:4
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LL | square_fn_mut();
| ^^^^^^^^^^^^^^^^
|
= note: closures are lazy and do nothing unless called
error: unused implementer of `Fn` that must be used
--> $DIR/must_use-in-stdlib-traits.rs:46:4
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LL | square_fn();
| ^^^^^^^^^^^^
|
= note: closures are lazy and do nothing unless called
error: aborting due to 5 previous errors
|
