15 lines
721 B
Plaintext
15 lines
721 B
Plaintext
error[E0658]: cannot cast `dyn Fn()` to `dyn FnMut()`, trait upcasting coercion is experimental
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--> $DIR/issue-11515.rs:10:38
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LL | let test = Box::new(Test { func: closure });
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| ^^^^^^^
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= note: see issue #65991 <https://github.com/rust-lang/rust/issues/65991> for more information
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= help: add `#![feature(trait_upcasting)]` to the crate attributes to enable
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= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
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= note: required when coercing `Box<(dyn Fn() + 'static)>` into `Box<(dyn FnMut() + 'static)>`
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error: aborting due to 1 previous error
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For more information about this error, try `rustc --explain E0658`.
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