tests/ui/type-alias-impl-trait/no_inferrable_concrete_type.stderr


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error: unconstrained opaque type
  --> $DIR/no_inferrable_concrete_type.rs:7:20
   |
LL |     pub type Foo = impl Copy;
   |                    ^^^^^^^^^
   |
   = note: `Foo` must be used in combination with a concrete type within the same module

error: aborting due to previous error