From 449042ebdb96f4f0e8fb159f4222e20d9b22c0de Mon Sep 17 00:00:00 2001
From: Yuki Okushi <huyuumi.dev@gmail.com>
Date: Fri, 31 Jul 2020 09:03:14 +0900
Subject: [PATCH] [PATCH] Presort restrictions to make output consistent

Gbp-Pq: Name u-1629fed4c0bdc6d3246ea63a91f600bcb8874626.patch
---
 src/librustc_typeck/check/method/suggest.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/librustc_typeck/check/method/suggest.rs b/src/librustc_typeck/check/method/suggest.rs
index 7ca3eb884d..3e8c5aabfd 100644
--- a/src/librustc_typeck/check/method/suggest.rs
+++ b/src/librustc_typeck/check/method/suggest.rs
@@ -676,6 +676,9 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                         .collect::<Vec<(usize, String)>>();
                     for ((span, empty_where), obligations) in type_params.into_iter() {
                         restrict_type_params = true;
+                        // #74886: Sort here so that the output is always the same.
+                        let mut obligations = obligations.into_iter().collect::<Vec<_>>();
+                        obligations.sort();
                         err.span_suggestion_verbose(
                             span,
                             &format!(
@@ -686,7 +689,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                             format!(
                                 "{} {}",
                                 if empty_where { " where" } else { "," },
-                                obligations.into_iter().collect::<Vec<_>>().join(", ")
+                                obligations.join(", ")
                             ),
                             Applicability::MaybeIncorrect,
                         );
-- 
2.30.2