From e8c38e74f0668b3d40e6923ebb582be5fc88c554 Mon Sep 17 00:00:00 2001
From: repo sync repo start master --all <wala1@illinois.edu>
Date: Wed, 11 Jan 2017 04:46:05 -0600
Subject: [PATCH] CSE: com_args can be empty too.

---
 sumpy/cse.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sumpy/cse.py b/sumpy/cse.py
index f9a4daba..01b61e83 100644
--- a/sumpy/cse.py
+++ b/sumpy/cse.py
@@ -253,7 +253,7 @@ def match_common_args(func_class, funcs, opt_subs):
             com_args = arg_tracker.func_to_argset[i].intersection(
                     arg_tracker.func_to_argset[j])
 
-            if len(com_args) == 1:
+            if len(com_args) <= 1:
                 # This may happen if a set of common arguments was already
                 # combined in a previous iteration.
                 continue
-- 
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