From 7dc34945e4f67b24fb310ec0e3195ef58544438f Mon Sep 17 00:00:00 2001
From: Eduard-Mihai Burtescu <edy.burt@gmail.com>
Date: Tue, 11 Jun 2019 12:47:08 +0300
Subject: [PATCH] rustc_lint: deny(unused_lifetimes).

---
 src/librustc_lint/builtin.rs | 2 +-
 src/librustc_lint/lib.rs     | 1 +
 src/librustc_lint/types.rs   | 2 +-
 3 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/librustc_lint/builtin.rs b/src/librustc_lint/builtin.rs
index 6e4d0e881f76b..f3b9408569397 100644
--- a/src/librustc_lint/builtin.rs
+++ b/src/librustc_lint/builtin.rs
@@ -96,7 +96,7 @@ declare_lint! {
 declare_lint_pass!(BoxPointers => [BOX_POINTERS]);
 
 impl BoxPointers {
-    fn check_heap_type<'a, 'tcx>(&self, cx: &LateContext<'_, '_>, span: Span, ty: Ty<'_>) {
+    fn check_heap_type(&self, cx: &LateContext<'_, '_>, span: Span, ty: Ty<'_>) {
         for leaf_ty in ty.walk() {
             if leaf_ty.is_box() {
                 let m = format!("type uses owned (Box type) pointers: {}", ty);
diff --git a/src/librustc_lint/lib.rs b/src/librustc_lint/lib.rs
index ba72beecc1a18..87d46a08d9aa6 100644
--- a/src/librustc_lint/lib.rs
+++ b/src/librustc_lint/lib.rs
@@ -21,6 +21,7 @@
 
 #![deny(rust_2018_idioms)]
 #![deny(internal)]
+#![deny(unused_lifetimes)]
 
 #[macro_use]
 extern crate rustc;
diff --git a/src/librustc_lint/types.rs b/src/librustc_lint/types.rs
index ac18e131c4a3d..7c185ba7423ad 100644
--- a/src/librustc_lint/types.rs
+++ b/src/librustc_lint/types.rs
@@ -202,7 +202,7 @@ fn report_bin_hex_error(
 //  - `uX` => `uY`
 //
 // No suggestion for: `isize`, `usize`.
-fn get_type_suggestion<'a>(
+fn get_type_suggestion(
     t: Ty<'_>,
     val: u128,
     negative: bool,