From fdce4168fc4c0a46bbe59d482f3d8a4cb4155537 Mon Sep 17 00:00:00 2001
From: AnthonyMikh <anthony.mikh@yandex.ru>
Date: Tue, 1 Oct 2019 03:04:01 +0300
Subject: [PATCH] Hint type for `.sum()`

---
 src/librustc_errors/emitter.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/librustc_errors/emitter.rs b/src/librustc_errors/emitter.rs
index aaae99655695c..263ffb0d17cc6 100644
--- a/src/librustc_errors/emitter.rs
+++ b/src/librustc_errors/emitter.rs
@@ -1526,7 +1526,7 @@ impl EmitterWriter {
                     // length of the code after substitution
                     let full_sub_len = part.snippet.chars()
                         .map(|ch| unicode_width::UnicodeWidthChar::width(ch).unwrap_or(1))
-                        .sum() as isize;
+                        .sum::<usize>() as isize;
 
                     // length of the code to be substituted
                     let snippet_len = span_end_pos as isize - span_start_pos as isize;