* io.c (rb_io_each_byte): rbuf can be refreshed during yield.

  [Bug #5119]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@32758 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 c62edbba00..d4787c75b4 100644
--- a/test/ruby/test_io.rb
+++ b/test/ruby/test_io.rb
@@ -235,6 +235,16 @@ class TestIO < Test::Unit::TestCase
     end)
   end
 
+  def test_each_byte_with_seek
+    t = make_tempfile
+    bug5119 = '[ruby-core:38609]'
+    i = 0
+    open(t.path) do |f|
+      f.each_byte {i = f.pos}
+    end
+    assert_equal(12, i, bug5119)
+  end
+
   def test_each_codepoint
     t = make_tempfile
     bug2959 = '[ruby-core:28650]'