error[E0405]: cannot find trait `SomeNonExistentTrait` in this scope
  --> $DIR/resolve-unknown-trait.rs:1:18
   |
LL | trait NewTrait : SomeNonExistentTrait {}
   |                  ^^^^^^^^^^^^^^^^^^^^ not found in this scope

error[E0405]: cannot find trait `SomeNonExistentTrait` in this scope
  --> $DIR/resolve-unknown-trait.rs:4:6
   |
LL | impl SomeNonExistentTrait for isize {}
   |      ^^^^^^^^^^^^^^^^^^^^ not found in this scope

error[E0405]: cannot find trait `SomeNonExistentTrait` in this scope
  --> $DIR/resolve-unknown-trait.rs:7:8
   |
LL | fn f<T:SomeNonExistentTrait>() {}
   |        ^^^^^^^^^^^^^^^^^^^^ not found in this scope

error: aborting due to 3 previous errors

For more information about this error, try `rustc --explain E0405`.