From 870a041262259e92ebde0c3f0effbf8b7199c225 Mon Sep 17 00:00:00 2001
From: Joshua Nelson <jyn514@gmail.com>
Date: Sat, 28 Nov 2020 14:52:25 -0500
Subject: [PATCH] Remove unnecessary `mut` binding

---
 compiler/rustc_trait_selection/src/traits/select/mod.rs | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/compiler/rustc_trait_selection/src/traits/select/mod.rs b/compiler/rustc_trait_selection/src/traits/select/mod.rs
index 5b31998b7d33f..74b6652981a8b 100644
--- a/compiler/rustc_trait_selection/src/traits/select/mod.rs
+++ b/compiler/rustc_trait_selection/src/traits/select/mod.rs
@@ -833,11 +833,10 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
     /// - it also appears in the backtrace at some position `X`,
     /// - all the predicates at positions `X..` between `X` and the top are
     ///   also defaulted traits.
-    pub fn coinductive_match<I>(&mut self, cycle: I) -> bool
+    pub fn coinductive_match<I>(&mut self, mut cycle: I) -> bool
     where
         I: Iterator<Item = ty::Predicate<'tcx>>,
     {
-        let mut cycle = cycle;
         cycle.all(|predicate| self.coinductive_predicate(predicate))
     }