Auto merge of #4255 - mikerite:fix-warnings-20190706, r=Manishearth

Fix unknown lint warnings

changelog: none

clippy_lints/src/lib.rs

@@ -8,7 +8,7 @@
 #![allow(clippy::missing_docs_in_private_items)]
 #![recursion_limit = "512"]
 #![warn(rust_2018_idioms, trivial_casts, trivial_numeric_casts)]
-#![deny(internal)]
+#![deny(rustc::internal)]
 #![feature(crate_visibility_modifier)]
 #![feature(concat_idents)]
 

clippy_lints/src/types.rs

@@ -1,4 +1,4 @@
-#![allow(default_hash_types)]
+#![allow(rustc::default_hash_types)]
 
 use std::borrow::Cow;
 use std::cmp::Ordering;