6efddac288
Expand the primary span of E0277 when the immediate unmet bound is not what the user wrote:
```
error[E0277]: the trait bound `i32: Bar` is not satisfied
--> f100.rs:6:6
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6 | <i32 as Foo>::foo();
| ^^^ the trait `Bar` is not implemented for `i32`, which is required by `i32: Foo`
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help: this trait has no implementations, consider adding one
--> f100.rs:2:1
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2 | trait Bar {}
| ^^^^^^^^^
note: required for `i32` to implement `Foo`
--> f100.rs:3:14
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3 | impl<T: Bar> Foo for T {}
| --- ^^^ ^
| |
| unsatisfied trait bound introduced here
```
Fix #40120.
85 lines
3.3 KiB
Plaintext
85 lines
3.3 KiB
Plaintext
error[E0277]: the trait bound `for<'a> &'a (): BufferMut` is not satisfied
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--> $DIR/issue-89118.rs:19:8
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LL | C: StackContext,
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| ^^^^^^^^^^^^ the trait `for<'a> BufferMut` is not implemented for `&'a ()`, which is required by `for<'a> Ctx<()>: BufferUdpStateContext<&'a ()>`
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help: this trait has no implementations, consider adding one
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--> $DIR/issue-89118.rs:1:1
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LL | trait BufferMut {}
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| ^^^^^^^^^^^^^^^
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note: required for `Ctx<()>` to implement `for<'a> BufferUdpStateContext<&'a ()>`
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--> $DIR/issue-89118.rs:5:23
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LL | impl<B: BufferMut, C> BufferUdpStateContext<B> for C {}
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| --------- ^^^^^^^^^^^^^^^^^^^^^^^^ ^
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| unsatisfied trait bound introduced here
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note: required by a bound in `StackContext`
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--> $DIR/issue-89118.rs:9:14
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LL | trait StackContext
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| ------------ required by a bound in this trait
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LL | where
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LL | Ctx<()>: for<'a> BufferUdpStateContext<&'a ()>,
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `StackContext`
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error[E0277]: the trait bound `for<'a> &'a (): BufferMut` is not satisfied
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--> $DIR/issue-89118.rs:29:9
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LL | impl<C> EthernetWorker<C> {}
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| ^^^^^^^^^^^^^^^^^ the trait `for<'a> BufferMut` is not implemented for `&'a ()`, which is required by `for<'a> Ctx<()>: BufferUdpStateContext<&'a ()>`
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help: this trait has no implementations, consider adding one
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--> $DIR/issue-89118.rs:1:1
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LL | trait BufferMut {}
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| ^^^^^^^^^^^^^^^
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note: required for `Ctx<()>` to implement `for<'a> BufferUdpStateContext<&'a ()>`
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--> $DIR/issue-89118.rs:5:23
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LL | impl<B: BufferMut, C> BufferUdpStateContext<B> for C {}
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| --------- ^^^^^^^^^^^^^^^^^^^^^^^^ ^
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| |
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| unsatisfied trait bound introduced here
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note: required by a bound in `EthernetWorker`
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--> $DIR/issue-89118.rs:28:14
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LL | struct EthernetWorker<C>(C)
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| -------------- required by a bound in this struct
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LL | where
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LL | Ctx<()>: for<'a> BufferUdpStateContext<&'a ()>;
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `EthernetWorker`
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error[E0277]: the trait bound `for<'a> &'a (): BufferMut` is not satisfied
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--> $DIR/issue-89118.rs:22:20
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LL | type Handler = Ctx<C::Dispatcher>;
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| ^^^^^^^^^^^^^^^^^^ the trait `for<'a> BufferMut` is not implemented for `&'a ()`, which is required by `for<'a> Ctx<()>: BufferUdpStateContext<&'a ()>`
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help: this trait has no implementations, consider adding one
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--> $DIR/issue-89118.rs:1:1
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LL | trait BufferMut {}
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| ^^^^^^^^^^^^^^^
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note: required for `Ctx<()>` to implement `for<'a> BufferUdpStateContext<&'a ()>`
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--> $DIR/issue-89118.rs:5:23
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LL | impl<B: BufferMut, C> BufferUdpStateContext<B> for C {}
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| --------- ^^^^^^^^^^^^^^^^^^^^^^^^ ^
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| |
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| unsatisfied trait bound introduced here
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note: required by a bound in `StackContext`
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--> $DIR/issue-89118.rs:9:14
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LL | trait StackContext
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| ------------ required by a bound in this trait
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LL | where
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LL | Ctx<()>: for<'a> BufferUdpStateContext<&'a ()>,
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `StackContext`
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error: aborting due to 3 previous errors
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For more information about this error, try `rustc --explain E0277`.
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