rustc-ap-rustc_cratesio_shim 508.0.0

Automatically published version of the package `rustc_cratesio_shim` in the rust-lang/rust repository from commit 53ae6d2eb5352cc20f2e9b92847d92e935639f3c The publishing script for this crate lives at: https://github.com/alexcrichton/rustc-auto-publish