From aa10abb2119f0740aac704a78d6eebd800ddb1da Mon Sep 17 00:00:00 2001
From: Nicholas Nethercote <nnethercote@mozilla.com>
Date: Fri, 20 Sep 2019 12:53:22 +1000
Subject: [PATCH] Rename a variable.

Because the meaning of this `index` variable is quite different to all
the other `index` variables in this file.
---
 src/librustc_data_structures/obligation_forest/mod.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/librustc_data_structures/obligation_forest/mod.rs b/src/librustc_data_structures/obligation_forest/mod.rs
index 2b7c44cdac35..1c7109fe500e 100644
--- a/src/librustc_data_structures/obligation_forest/mod.rs
+++ b/src/librustc_data_structures/obligation_forest/mod.rs
@@ -507,8 +507,8 @@ impl<O: ForestObligation> ObligationForest<O> {
         let node = &self.nodes[index];
         match node.state.get() {
             NodeState::OnDfsStack => {
-                let index = stack.iter().rposition(|&n| n == index).unwrap();
-                processor.process_backedge(stack[index..].iter().map(GetObligation(&self.nodes)),
+                let rpos = stack.iter().rposition(|&n| n == index).unwrap();
+                processor.process_backedge(stack[rpos..].iter().map(GetObligation(&self.nodes)),
                                            PhantomData);
             }
             NodeState::Success => {