From: Stefan Rusterholz <apeiros@...>
Date: 2012-05-06T20:29:19+09:00
Subject: Bug in IO::pipe with regards to encodings?

Hi

Given the following code:
	in_io,out_io = IO.pipe("binary", "binary")

I would expect both in_io and out_io to give 'binary' on all encodings, yet I get binary only on in_io's external_encoding:
	in_io.internal_encoding # => nil
	in_io.external_encoding # => #<Encoding:ASCII-8BIT>
	out_io.internal_encoding # => nil
	out_io.external_encoding # => #<Encoding:UTF-8>

Some diagnostic information:
	RUBY_DESCRIPTION # => "ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-darwin11.3.0]"
	Encoding.default_internal # => #<Encoding:UTF-8>
	Encoding.default_external # => #<Encoding:UTF-8>

I'd consider this a bug. But before reporting, I'd like to get the input from others. What do you think, is this a bug? If not, why not?

Best regards
Stefan, aka apeiros