From 0ff0669b79d768dd32ceefeb76cad7332221492b Mon Sep 17 00:00:00 2001
From: csmoe <35686186+csmoe@users.noreply.github.com>
Date: Sun, 16 Sep 2018 21:12:23 +0800
Subject: [PATCH] replace old literal in expr

---
 src/librustc_typeck/check/demand.rs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/librustc_typeck/check/demand.rs b/src/librustc_typeck/check/demand.rs
index 2f80edd5433..25559bdec76 100644
--- a/src/librustc_typeck/check/demand.rs
+++ b/src/librustc_typeck/check/demand.rs
@@ -422,7 +422,12 @@ impl<'a, 'gcx, 'tcx> FnCtxt<'a, 'gcx, 'tcx> {
             let suffix_suggestion = format!(
                 "{}{}{}{}",
                 if needs_paren { "(" } else { "" },
-                src,
+                {
+                    // 42u8
+                    // ^^
+                    let lit_offset = src.len() - checked_ty.to_string().len();
+                    &src[..lit_offset]
+                },
                 expected_ty,
                 if needs_paren { ")" } else { "" },
             );