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error: generic parameters may not be used in const operations
--> $DIR/issue-67945-4.rs:10:27
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LL | let x: Option<Box<S>> = None;
| ^ cannot perform const operation using `S`
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= note: type parameters may not be used in const expressions
= help: use `#![feature(generic_const_exprs)]` to allow generic const expressions
error[E0392]: parameter `S` is never used
--> $DIR/issue-67945-4.rs:8:12
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LL | struct Bug<S> {
| ^ unused parameter
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= help: consider removing `S`, referring to it in a field, or using a marker such as `PhantomData`
= help: if you intended `S` to be a const parameter, use `const S: usize` instead
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0392`.
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