From 3bbb218e2682de2d566cc66115a108a56c04f42c Mon Sep 17 00:00:00 2001
From: Justus Winter <4winter@informatik.uni-hamburg.de>
Date: Fri, 19 Jul 2013 08:53:53 +0200
Subject: Fix error handling macro E

Previously the macro argument err was expanded and thus potentially
evaluated multiple times. This is fine for simple values or pure
functions, but not for say iohelp_create_iouser. Fix this by
evaluating the macro argument only once.
---
 libiohelp/iouser-create.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libiohelp/iouser-create.c b/libiohelp/iouser-create.c
index f1dd2f0e..980c8a1e 100644
--- a/libiohelp/iouser-create.c
+++ b/libiohelp/iouser-create.c
@@ -33,8 +33,9 @@ iohelp_create_iouser (struct iouser **user, struct idvec *uids,
   return 0;
 }
 
-#define E(err)				\
+#define E(err_)				\
 	do {				\
+	  error_t err = err_;		\
 	  if (err)			\
 	    {				\
 	      *user = 0;		\
-- 
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