From ec6cd14c7a869b32776c1d3387afc93f369aea62 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Ren=C3=A9=20Scharfe?= <l.s.r@web.de>
Date: Sat, 11 Feb 2017 14:58:44 +0100
Subject: [PATCH] cocci: detect useless free(3) calls

Add a semantic patch for removing checks that cause free(3) to only be
called with a NULL pointer, as that must be a programming mistake.

Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 contrib/coccinelle/free.cocci | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/contrib/coccinelle/free.cocci b/contrib/coccinelle/free.cocci
index e28213161a..c03ba737e5 100644
--- a/contrib/coccinelle/free.cocci
+++ b/contrib/coccinelle/free.cocci
@@ -3,3 +3,9 @@ expression E;
 @@
 - if (E)
   free(E);
+
+@@
+expression E;
+@@
+- if (!E)
+  free(E);
-- 
2.11.4.GIT