From 21d99677f6351d632d413198f0df7c9558de7e2f Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Thu, 13 Dec 2018 05:09:58 +0000
Subject: Separate RSTRING_PTR from a function call

Do not apply RSTRING_PTR, a macro which evaluats its argument
multiple times, on a function call.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66377 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ext/date/date_core.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/ext/date/date_core.c b/ext/date/date_core.c
index e61d952cbf..49027e92b1 100644
--- a/ext/date/date_core.c
+++ b/ext/date/date_core.c
@@ -6661,7 +6661,9 @@ tmx_m_of(union DateData *x)
 static char *
 tmx_m_zone(union DateData *x)
 {
-    return RSTRING_PTR(m_zone(x));
+    VALUE zone = m_zone(x);
+    /* TODO: fix potential dangling pointer */
+    return RSTRING_PTR(zone);
 }
 
 static const struct tmx_funcs tmx_funcs = {
-- 
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