55 lines
1.9 KiB
Plaintext
55 lines
1.9 KiB
Plaintext
error[E0072]: recursive types `A` and `B` have infinite size
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--> $DIR/issue-105231.rs:1:1
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LL | struct A<T>(B<T>);
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| ^^^^^^^^^^^ ---- recursive without indirection
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...
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LL | struct B<T>(A<A<T>>);
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| ^^^^^^^^^^^ ------- recursive without indirection
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help: insert some indirection (e.g., a `Box`, `Rc`, or `&`) to break the cycle
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LL ~ struct A<T>(Box<B<T>>);
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LL |
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LL |
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LL ~ struct B<T>(Box<A<A<T>>>);
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error: type parameter `T` is only used recursively
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--> $DIR/issue-105231.rs:1:15
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LL | struct A<T>(B<T>);
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| - ^
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| |
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| type parameter must be used non-recursively in the definition
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= help: consider removing `T`, referring to it in a field, or using a marker such as `PhantomData`
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= note: all type parameters must be used in a non-recursive way in order to constrain their variance
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error: type parameter `T` is only used recursively
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--> $DIR/issue-105231.rs:4:17
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LL | struct B<T>(A<A<T>>);
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| - ^
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| |
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| type parameter must be used non-recursively in the definition
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= help: consider removing `T`, referring to it in a field, or using a marker such as `PhantomData`
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= note: all type parameters must be used in a non-recursive way in order to constrain their variance
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error[E0119]: conflicting implementations of trait `Foo` for type `B<u8>`
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--> $DIR/issue-105231.rs:8:1
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LL | impl<T> Foo for T where T: Send {}
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| ------------------------------- first implementation here
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LL | impl Foo for B<u8> {}
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| ^^^^^^^^^^^^^^^^^^ conflicting implementation for `B<u8>`
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= note: overflow evaluating the requirement `B<u8>: Send`
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= help: consider increasing the recursion limit by adding a `#![recursion_limit = "256"]` attribute to your crate (`issue_105231`)
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error: aborting due to 4 previous errors
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Some errors have detailed explanations: E0072, E0119.
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For more information about an error, try `rustc --explain E0072`.
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