From 1200f33116ae393d199ea318043951bbceea64b9 Mon Sep 17 00:00:00 2001
From: Justin Viiret <justin.viiret@intel.com>
Date: Wed, 22 Mar 2017 10:56:59 +1100
Subject: [PATCH] ng_region: no need to copy enters

---
 src/nfagraph/ng_region.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/nfagraph/ng_region.cpp b/src/nfagraph/ng_region.cpp
index 6fef9aa9..91904b46 100644
--- a/src/nfagraph/ng_region.cpp
+++ b/src/nfagraph/ng_region.cpp
@@ -194,7 +194,9 @@ void buildInitialCandidate(const AcyclicGraph &g,
         return;
     }
 
-    auto enters = exits.front().open; // copy
+    // Note: findExits() will clear exits, so it's safe to mutate/move its
+    // elements here.
+    auto &enters = exits.front().open;
     candidate.clear();
 
     for (; it != ite; ++it) {