From ad9ad6f402e3e15706519e59ef111a941d28d5af Mon Sep 17 00:00:00 2001
From: rail <12975677+rail-rain@users.noreply.github.com>
Date: Mon, 27 Apr 2020 17:42:57 +1200
Subject: [PATCH] Don't negate resulted offsets when `offset` is subtraction by
 0

---
 clippy_lints/src/loops.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/clippy_lints/src/loops.rs b/clippy_lints/src/loops.rs
index cb44eccae68..f16b98883b8 100644
--- a/clippy_lints/src/loops.rs
+++ b/clippy_lints/src/loops.rs
@@ -960,8 +960,8 @@ fn detect_manual_memcpy<'a, 'tcx>(
             let print_sum = |arg1: &Offset, arg2: &Offset| -> String {
                 match (&arg1.value[..], arg1.negate, &arg2.value[..], arg2.negate) {
                     ("0", _, "0", _) => "".into(),
-                    ("0", _, x, false) | (x, false, "0", false) => x.into(),
-                    ("0", _, x, true) | (x, false, "0", true) => format!("-{}", x),
+                    ("0", _, x, false) | (x, false, "0", _) => x.into(),
+                    ("0", _, x, true) => format!("-{}", x),
                     (x, false, y, false) => format!("({} + {})", x, y),
                     (x, false, y, true) => {
                         if x == y {