From d5690a001e0ba19a1f80998005be8f79ca475223 Mon Sep 17 00:00:00 2001
From: Justin Ethier <justin.ethier@gmail.com>
Date: Fri, 7 Dec 2018 17:00:32 -0500
Subject: [PATCH] Do not assume `return_copy` receives an object.

It may be passed a call instead, in which case we want to refer to the call as a local variable instead of making that call more than once!
---
 include/cyclone/types.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/cyclone/types.h b/include/cyclone/types.h
index d5544f50..ea8134d8 100644
--- a/include/cyclone/types.h
+++ b/include/cyclone/types.h
@@ -1351,9 +1351,10 @@ typedef union {
   complex_num_type complex_num_t;
 } common_type;
 
-#define return_copy(ptr, obj) \
+#define return_copy(ptr, o) \
 { \
   tag_type t; \
+  object obj = o; \
   if (!is_object_type(obj)) \
     return obj; \
   t = type_of(obj); \