merge revision(s) 24751:

	* io.c (rb_io_binmode): check if closed regardless platforms.
	  [ruby-core:25363]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8_7@25812 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 17 insertions, 0 deletions

diff --git a/test/ruby/test_io.rb b/test/ruby/test_io.rb
index 19b4f0ebf6..b5e9b8ec06 100644
--- a/test/ruby/test_io.rb
+++ b/test/ruby/test_io.rb
@@ -1,5 +1,6 @@
 require 'test/unit'
 require 'tmpdir'
+require 'tempfile'
 
 class TestIO < Test::Unit::TestCase
   def mkcdtmpdir
@@ -28,4 +29,20 @@ class TestIO < Test::Unit::TestCase
       }
     }
   end
+
+  def make_tempfile
+    t = Tempfile.new("foo")
+    t.binmode
+    t.puts "foo"
+    t.puts "bar"
+    t.puts "baz"
+    t.close
+    t
+  end
+
+  def test_binmode_after_closed
+    t = make_tempfile
+    t.close
+    assert_raise(IOError) {t.binmode}
+  end
 end