error[E0433]: failed to resolve: partially resolved path in a derive macro
  --> $DIR/issue-46101.rs:3:10
   |
LL | #[derive(Foo::Anything)]
   |          ^^^^^^^^^^^^^ partially resolved path in a derive macro

error[E0601]: `main` function not found in crate `issue_46101`
   |
   = note: consider adding a `main` function to `$DIR/issue-46101.rs`

error: aborting due to 2 previous errors

Some errors have detailed explanations: E0433, E0601.
For more information about an error, try `rustc --explain E0433`.