error: no documentation found for this crate's top-level module
   |
   = help: The following guide may be of use:
           https://doc.rust-lang.org/$CHANNEL/rustdoc/how-to-write-documentation.html
note: the lint level is defined here
  --> $DIR/no-crate-level-doc-lint.rs:3:9
   |
LL | #![deny(rustdoc::missing_crate_level_docs)]
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to 1 previous error