error[E0599]: no variant named `Baz` found for type `Foo` in the current scope
  --> $DIR/issue-28971.rs:19:13
   |
13 | enum Foo {
   | -------- variant `Baz` not found here
...
19 |             Foo::Baz(..) => (),
   |             ^^^^^^^^^^^^ variant not found in `Foo`

error: aborting due to previous error