* io.c (rb_io_check_readable): side effect for STDIN removed.

  (rb_io_external_encoding): ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@18695 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 19 insertions, 0 deletions

diff --git a/test/ruby/test_io_m17n.rb b/test/ruby/test_io_m17n.rb
index b059f70ff3..fbf386548a 100644
--- a/test/ruby/test_io_m17n.rb
+++ b/test/ruby/test_io_m17n.rb
@@ -1,6 +1,7 @@
 require 'test/unit'
 require 'tmpdir'
 require 'timeout'
+require_relative 'envutil'
 
 class TestIO_M17N < Test::Unit::TestCase
   ENCS = [
@@ -662,5 +663,23 @@ EOT
     }
   end
 
+  def test_stdin_external_encoding_with_reopen
+    with_tmpdir {
+      open("tst", "w+") {|f|
+        pid = spawn(EnvUtil.rubybin, '-e', <<-'End', 10=>f)
+          io = IO.new(10, "r+")
+          STDIN.reopen(io)
+          STDIN.external_encoding
+          STDIN.write "\u3042"
+          STDIN.flush 
+        End
+        Process.wait pid
+        f.rewind
+        result = f.read.force_encoding("ascii-8bit")
+        assert_equal("\u3042".force_encoding("ascii-8bit"), result)
+      }
+    }
+  end
+
 end