* io.c (io_reopen): discards read buffer. [ruby-core:24240]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@24144 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 10 insertions, 0 deletions

diff --git a/test/ruby/test_io.rb b/test/ruby/test_io.rb
index 8a5b878f3b..42614e00cb 100644
--- a/test/ruby/test_io.rb
+++ b/test/ruby/test_io.rb
@@ -1270,6 +1270,16 @@ class TestIO < Test::Unit::TestCase
         assert_equal("foo\n", f.gets)
       }
     end
+
+    open(__FILE__) do |f|
+      f.gets
+      f2 = open(t.path)
+      f2.gets
+      assert_nothing_raised {
+        f.reopen(f2)
+        assert_equal("bar\n", f.gets, '[ruby-core:24240]')
+      }
+    end
   end
 
   def test_foreach