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Rollup merge of #89480 - hameerabbasi:issue-89118-test, r=jackh726

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Add test for issue 89118.

This PR adds a test for issue 89118.

Closes #89118.
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Jubilee 2021-10-04 21:12:41 -07:00 committed by GitHub
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32
src/test/ui/higher-rank-trait-bounds/normalize-under-binder/issue-89118.rs Normal file
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@ -0,0 +1,32 @@
trait BufferMut {}
struct Ctx<D>(D);
trait BufferUdpStateContext<B> {}
impl<B: BufferMut, C> BufferUdpStateContext<B> for C {}
trait StackContext
where
Ctx<()>: for<'a> BufferUdpStateContext<&'a ()>,
{
type Dispatcher;
}
trait TimerContext {
type Handler;
}
impl<C> TimerContext for C
where
C: StackContext,
//~^ ERROR: is not satisfied [E0277]
{
type Handler = Ctx<C::Dispatcher>;
//~^ ERROR: is not satisfied [E0277]
}
struct EthernetWorker<C>(C)
where
Ctx<()>: for<'a> BufferUdpStateContext<&'a ()>;
impl<C> EthernetWorker<C> {}
//~^ ERROR: is not satisfied [E0277]
fn main() {}

63
src/test/ui/higher-rank-trait-bounds/normalize-under-binder/issue-89118.stderr Normal file
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error[E0277]: the trait bound `for<'a> &'a (): BufferMut` is not satisfied
--> $DIR/issue-89118.rs:19:8
|
LL | C: StackContext,
| ^^^^^^^^^^^^ the trait `for<'a> BufferMut` is not implemented for `&'a ()`
|
note: required because of the requirements on the impl of `for<'a> BufferUdpStateContext<&'a ()>` for `Ctx<()>`
--> $DIR/issue-89118.rs:5:23
|
LL | impl<B: BufferMut, C> BufferUdpStateContext<B> for C {}
| ^^^^^^^^^^^^^^^^^^^^^^^^ ^
note: required by a bound in `StackContext`
--> $DIR/issue-89118.rs:9:14
|
LL | trait StackContext
| ------------ required by a bound in this
LL | where
LL | Ctx<()>: for<'a> BufferUdpStateContext<&'a ()>,
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `StackContext`
error[E0277]: the trait bound `for<'a> &'a (): BufferMut` is not satisfied
--> $DIR/issue-89118.rs:22:20
|
LL | type Handler = Ctx<C::Dispatcher>;
| ^^^^^^^^^^^^^^^^^^ the trait `for<'a> BufferMut` is not implemented for `&'a ()`
|
note: required because of the requirements on the impl of `for<'a> BufferUdpStateContext<&'a ()>` for `Ctx<()>`
--> $DIR/issue-89118.rs:5:23
|
LL | impl<B: BufferMut, C> BufferUdpStateContext<B> for C {}
| ^^^^^^^^^^^^^^^^^^^^^^^^ ^
note: required by a bound in `StackContext`
--> $DIR/issue-89118.rs:9:14
|
LL | trait StackContext
| ------------ required by a bound in this
LL | where
LL | Ctx<()>: for<'a> BufferUdpStateContext<&'a ()>,
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `StackContext`
error[E0277]: the trait bound `for<'a> &'a (): BufferMut` is not satisfied
--> $DIR/issue-89118.rs:29:9
|
LL | impl<C> EthernetWorker<C> {}
| ^^^^^^^^^^^^^^^^^ the trait `for<'a> BufferMut` is not implemented for `&'a ()`
|
note: required because of the requirements on the impl of `for<'a> BufferUdpStateContext<&'a ()>` for `Ctx<()>`
--> $DIR/issue-89118.rs:5:23
|
LL | impl<B: BufferMut, C> BufferUdpStateContext<B> for C {}
| ^^^^^^^^^^^^^^^^^^^^^^^^ ^
note: required by a bound in `EthernetWorker`
--> $DIR/issue-89118.rs:28:14
|
LL | struct EthernetWorker<C>(C)
| -------------- required by a bound in this
LL | where
LL | Ctx<()>: for<'a> BufferUdpStateContext<&'a ()>;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `EthernetWorker`
error: aborting due to 3 previous errors
For more information about this error, try `rustc --explain E0277`.