From 082915290da2619ecc9528fb6af3fae2a9d8e997 Mon Sep 17 00:00:00 2001
From: Andrew Cann <shum@canndrew.org>
Date: Fri, 29 Jul 2016 19:20:57 +0800
Subject: [PATCH] Make unused lint ignore unused `!`

---
 src/librustc_lint/unused.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/librustc_lint/unused.rs b/src/librustc_lint/unused.rs
index 4dc1a5e4f5e..cd24de6a0a7 100644
--- a/src/librustc_lint/unused.rs
+++ b/src/librustc_lint/unused.rs
@@ -133,6 +133,7 @@ fn check_stmt(&mut self, cx: &LateContext, s: &hir::Stmt) {
         let t = cx.tcx.expr_ty(&expr);
         let warned = match t.sty {
             ty::TyTuple(ref tys) if tys.is_empty() => return,
+            ty::TyEmpty => return,
             ty::TyBool => return,
             ty::TyStruct(def, _) |
             ty::TyEnum(def, _) => {
-- 
2.44.0