From 5f40adb70cffbdd68667826cf5e620e4ffe0ad7b Mon Sep 17 00:00:00 2001
From: Max Brunsfeld <maxbrunsfeld@gmail.com>
Date: Tue, 8 Aug 2017 17:20:04 -0700
Subject: [PATCH] Recur to sub-rules in a deterministic order in expand_repeats

---
 src/compiler/prepare_grammar/expand_repeats.cc | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/src/compiler/prepare_grammar/expand_repeats.cc b/src/compiler/prepare_grammar/expand_repeats.cc
index c4a25634..9f663d67 100644
--- a/src/compiler/prepare_grammar/expand_repeats.cc
+++ b/src/compiler/prepare_grammar/expand_repeats.cc
@@ -36,10 +36,9 @@ class ExpandRepeats {
       },
 
       [&](const rules::Seq &sequence) {
-        return rules::Seq{
-          apply(*sequence.left),
-          apply(*sequence.right)
-        };
+        auto left = apply(*sequence.left);
+        auto right = apply(*sequence.right);
+        return rules::Seq{left, right};
       },
 
       [&](const rules::Repeat &repeat) {