From 2e4b5a32f27d46494198c8e1f62da2c5abb9c883 Mon Sep 17 00:00:00 2001 From: nagachika Date: Mon, 16 Jan 2017 18:40:22 +0000 Subject: merge revision(s) 57108: [Backport #13121] sprintf.c: fix width underflow * sprintf.c (rb_str_format): fix memory corruption by width underflow. https://github.com/mruby/mruby/issues/3347 git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@57340 b2dd03c8-39d4-4d8f-98ff-823fe69b080e --- test/ruby/test_sprintf.rb | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'test/ruby') diff --git a/test/ruby/test_sprintf.rb b/test/ruby/test_sprintf.rb index 8aa0cbfea5..f94d38d510 100644 --- a/test/ruby/test_sprintf.rb +++ b/test/ruby/test_sprintf.rb @@ -433,4 +433,9 @@ class TestSprintf < Test::Unit::TestCase h = { key: nil, key2: "key2_val" } assert_equal("key is , key2 is key2_val", "key is %{key}, key2 is %{key2}" % h) end + + def test_width_underflow + bug = 'https://github.com/mruby/mruby/issues/3347' + assert_equal("!", sprintf("%*c", 0, ?!.ord), bug) + end end -- cgit v1.2.3