Bug #11445
Updated by nobu (Nobuyoshi Nakada) almost 9 years ago
In Ruby 1.9.3 cloned `StringIO` StringIO instance has influence on close state of original instance: ~~~ruby require 'stringio' sio1 = StringIO.new( 'abc' ) sio2 = sio1.clone sio2.read sio1.pos # => 3, expected 0 sio2.close sio1.closed? # => true, expected false ~~~ If `File` File is used instead of `StringIO`, StringIO, close state is not shared between instances (position is). This behaviour has changed in Ruby 2.0.0 (cloned `StringIO` StringIO instance does not close original instance). It matters what definition for `IO` IO clone is, whether to share attributes (e.g. `pos`) pos) and/or state (`closed?`) (closed?) but the later is acting differently in 1.9.3 for `StringIO` StringIO and `File`. File.