rustc-ap-rustc_cratesio_shim 399.0.0

Automatically published version of the package `rustc_cratesio_shim` in the rust-lang/rust repository from commit f22dca0a1bef4141e75326caacc3cd59f3d5be8e The publishing script for this crate lives at: https://github.com/alexcrichton/rustc-auto-publish