trivially copy pass by ref

src/lib.rs

@@ -392,6 +392,7 @@
 #![cfg_attr(bench, feature(test))] // lib stability features as per RFC #507
 #![deny(missing_docs)]
 #![deny(missing_debug_implementations)]
+#![allow(trivially_copy_pass_by_ref)]
 
 // The explicit 'static lifetimes are still needed for rustc 1.13-16
 // backward compatibility, and this appeases clippy. If minimum rustc