From 58f77932a45873d691d9dab1f042da45822bd991 Mon Sep 17 00:00:00 2001
From: nagachika <nagachika@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 6 Apr 2016 16:15:59 +0000
Subject: merge revision(s) 54304: [Backport #12223]

	* sprintf.c (rb_str_format): fix buffer overflow, length must be
	  greater than precision.  reported by William Bowling <will AT
	  wbowling.info>.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@54505 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 test/ruby/test_sprintf.rb | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'test/ruby')

diff --git a/test/ruby/test_sprintf.rb b/test/ruby/test_sprintf.rb
index 1d3badddf9..66ae4db853 100644
--- a/test/ruby/test_sprintf.rb
+++ b/test/ruby/test_sprintf.rb
@@ -172,6 +172,10 @@ class TestSprintf < Test::Unit::TestCase
     assert_equal("x"*10+"     1.0", sprintf("x"*10+"%8.1f", 1r))
   end
 
+  def test_rational_precision
+    assert_match(/\A0\.\d{600}\z/, sprintf("%.600f", 600**~60))
+  end
+
   def test_hash
     options = {:capture=>/\d+/}
     assert_equal("with options {:capture=>/\\d+/}", sprintf("with options %p" % options))
-- 
cgit v1.2.3