error[E0658]: non-inline modules in proc macro input are unstable
 --> tests/ui/invalid_pymodule_in_root.rs:4:1
  |
4 | mod invalid_pymodule_in_root_module;
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |
  = note: see issue #54727 <https://github.com/rust-lang/rust/issues/54727> for more information

error: `#[pymodule]` can only be used on inline modules
 --> tests/ui/invalid_pymodule_in_root.rs:4:1
  |
4 | mod invalid_pymodule_in_root_module;
  | ^^^