warning: trait item `hello` from `Downstream` shadows identically named item from supertrait
  --> $DIR/false-subtrait-after-inference.rs:13:5
   |
LL |     fn hello(&self) {}
   |     ^^^^^^^^^^^^^^^
   |
note: item from `Upstream` is shadowed by a subtrait item
  --> $DIR/false-subtrait-after-inference.rs:8:5
   |
LL |     fn hello(&self) {}
   |     ^^^^^^^^^^^^^^^
note: the lint level is defined here
  --> $DIR/false-subtrait-after-inference.rs:3:9
   |
LL | #![warn(supertrait_item_shadowing_definition)]
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

warning: trait item `hello` from `Downstream` shadows identically named item from supertrait
  --> $DIR/false-subtrait-after-inference.rs:22:7
   |
LL |     x.hello();
   |       ^^^^^
   |
note: item from `Downstream` shadows a supertrait item
  --> $DIR/false-subtrait-after-inference.rs:13:5
   |
LL |     fn hello(&self) {}
   |     ^^^^^^^^^^^^^^^
note: item from `Upstream` is shadowed by a subtrait item
  --> $DIR/false-subtrait-after-inference.rs:8:5
   |
LL |     fn hello(&self) {}
   |     ^^^^^^^^^^^^^^^
note: the lint level is defined here
  --> $DIR/false-subtrait-after-inference.rs:2:9
   |
LL | #![warn(supertrait_item_shadowing_usage)]
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error[E0277]: the trait bound `i32: Foo` is not satisfied
  --> $DIR/false-subtrait-after-inference.rs:22:7
   |
LL |     x.hello();
   |       ^^^^^ the trait `Foo` is not implemented for `i32`
   |
help: this trait has no implementations, consider adding one
  --> $DIR/false-subtrait-after-inference.rs:18:1
   |
LL | trait Foo {}
   | ^^^^^^^^^
note: required for `W<i32>` to implement `Downstream`
  --> $DIR/false-subtrait-after-inference.rs:16:9
   |
LL | impl<T> Downstream for W<T> where T: Foo {}
   |         ^^^^^^^^^^     ^^^^          --- unsatisfied trait bound introduced here

error: aborting due to 1 previous error; 2 warnings emitted

For more information about this error, try `rustc --explain E0277`.