From 12fbad8c30256b0b7a9681f0e7a63cf0ca690d1f Mon Sep 17 00:00:00 2001
From: vlefevre <vlefevre@280ebfd0-de03-0410-8827-d642c229c3f4>
Date: Mon, 30 Jul 2018 09:32:15 +0000
Subject: [src/vasprintf.c] Fixed "store to null pointer" and free of bad
 pointer in case of error. (merged part of changeset r12957 from the trunk)

git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/branches/4.0@12965 280ebfd0-de03-0410-8827-d642c229c3f4
---
 src/vasprintf.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/vasprintf.c b/src/vasprintf.c
index b4fee3477..19d9998bc 100644
--- a/src/vasprintf.c
+++ b/src/vasprintf.c
@@ -2320,8 +2320,10 @@ mpfr_vasnprintf_aux (char **ptr, char *Buf, size_t size, const char *fmt,
     }
 
   MPFR_SAVE_EXPO_FREE (expo);
-  *ptr = NULL;
-  mpfr_free_func (buf.start, buf.size);
+  if (ptr != NULL)  /* implement mpfr_vasprintf */
+    *ptr = NULL;
+  if (ptr != NULL || size != 0)
+    mpfr_free_func (buf.start, buf.size);
 
   return -1;
 }
-- 
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