From 03dd8b9f438403f70a90cf775ac276231f70fc29 Mon Sep 17 00:00:00 2001
From: Andreas Kloeckner <inform@tiker.net>
Date: Fri, 24 Aug 2012 00:31:50 -0400
Subject: [PATCH] Minor kernel fix.

---
 loopy/kernel.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/loopy/kernel.py b/loopy/kernel.py
index 6fea7bfac..d8d78ece8 100644
--- a/loopy/kernel.py
+++ b/loopy/kernel.py
@@ -960,7 +960,7 @@ class LoopKernel(Record):
         result = set()
         for dom in self.domains:
             result.update(dom.get_var_names(dim_type.set))
-        return result
+        return frozenset(result)
 
     @memoize_method
     def non_iname_variable_names(self):
-- 
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