190589f8a7
When a trait bound is not met and restricting a type parameter would make the restriction hold, use a structured suggestion pointing at an appropriate place (type param in param list or `where` clause). Account for opaque parameters where instead of suggesting extending the `where` clause, we suggest appending the new restriction: `fn foo(impl Trait + UnmetTrait)`.
37 lines
1.6 KiB
Plaintext
37 lines
1.6 KiB
Plaintext
error[E0277]: `T` cannot be shared between threads safely
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--> $DIR/phantom-oibit.rs:21:12
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LL | fn is_zen<T: Zen>(_: T) {}
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| ------ --- required by this bound in `is_zen`
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LL |
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LL | fn not_sync<T>(x: Guard<T>) {
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| - help: consider restricting this bound: `T: std::marker::Sync`
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LL | is_zen(x)
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| ^ `T` cannot be shared between threads safely
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= help: the trait `std::marker::Sync` is not implemented for `T`
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= note: required because of the requirements on the impl of `Zen` for `&T`
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= note: required because it appears within the type `std::marker::PhantomData<&T>`
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= note: required because it appears within the type `Guard<'_, T>`
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error[E0277]: `T` cannot be shared between threads safely
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--> $DIR/phantom-oibit.rs:26:12
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LL | fn is_zen<T: Zen>(_: T) {}
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| ------ --- required by this bound in `is_zen`
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...
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LL | fn nested_not_sync<T>(x: Nested<Guard<T>>) {
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| - help: consider restricting this bound: `T: std::marker::Sync`
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LL | is_zen(x)
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| ^ `T` cannot be shared between threads safely
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= help: the trait `std::marker::Sync` is not implemented for `T`
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= note: required because of the requirements on the impl of `Zen` for `&T`
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= note: required because it appears within the type `std::marker::PhantomData<&T>`
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= note: required because it appears within the type `Guard<'_, T>`
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= note: required because it appears within the type `Nested<Guard<'_, T>>`
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error: aborting due to 2 previous errors
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For more information about this error, try `rustc --explain E0277`.
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