From 909d14a1dbd94e6133b3df5fc80e114fec655fa9 Mon Sep 17 00:00:00 2001
From: mrkn <mrkn@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Fri, 22 Nov 2013 13:31:26 +0000
Subject: [PATCH] * ext/bigdecimal/bigdecimal.c (BigDecimal_power):   Round the
 result value only if the precision is given.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43803 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ChangeLog                   | 5 +++++
 ext/bigdecimal/bigdecimal.c | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index b32b1a98f5..fffcc76a81 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Fri Nov 22 22:30:00 2013  Kenta Murata  <mrkn@mrkn.jp>
+
+	* ext/bigdecimal/bigdecimal.c (BigDecimal_power):
+	  Round the result value only if the precision is given.
+
 Fri Nov 22 17:20:50 2013  NARUSE, Yui  <naruse@ruby-lang.org>
 
 	* transcode.c (str_transcode0): don't scrub invalid chars if
diff --git a/ext/bigdecimal/bigdecimal.c b/ext/bigdecimal/bigdecimal.c
index 0ed5147c9d..f630c0a167 100644
--- a/ext/bigdecimal/bigdecimal.c
+++ b/ext/bigdecimal/bigdecimal.c
@@ -2383,7 +2383,7 @@ retry:
 	GUARD_OBJ(y, VpCreateRbObject(1, "0"));
     }
     VpPower(y, x, int_exp);
-    if (VpIsDef(y)) {
+    if (!NIL_P(prec) && VpIsDef(y)) {
 	VpMidRound(y, VpGetRoundMode(), n);
     }
     return ToValue(y);