Don't warn about shadowing in the case where the alias is built-in
Don't warn about shadowing in the case where the alias is built-in

rust-lang/cargo,eminence/cargo,rustyhorde/cargo,eminence/cargo,rust-lang/cargo,rustyhorde/cargo,rust-lang/cargo,rust-lang/cargo,eminence/cargo,eminence/cargo,rustyhorde/cargo,rustyhorde/cargo