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error[E0277]: cannot add `<T as SubEncoder>::ActualSize` to `<T as SubEncoder>::ActualSize`
--> $DIR/issue-54108.rs:19:17
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LL | type Size = <Self as SubEncoder>::ActualSize;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no implementation for `<T as SubEncoder>::ActualSize + <T as SubEncoder>::ActualSize`
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= help: the trait `Add` is not implemented for `<T as SubEncoder>::ActualSize`
note: required by a bound in `Encoder::Size`
--> $DIR/issue-54108.rs:4:16
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LL | type Size: Add<Output = Self::Size>;
| ^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `Encoder::Size`
help: consider further restricting the associated type
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LL | T: SubEncoder, <T as SubEncoder>::ActualSize: Add
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
error: aborting due to previous error
For more information about this error, try `rustc --explain E0277`.
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