From: Yukihiro Matsumoto <matz@...>
Date: 2009-02-04T10:38:14+09:00
Subject: [ruby-core:21821] Re: [Bug #1098] Unclear encoding error: #<Encoding::UndefinedConversionError: "\xE2\x96\x80" from UTF-8 to ISO-8859-1 in conversion from CP850 to ISO-8859-1>

Hi,

In message "Re: [ruby-core:21802] [Bug #1098] Unclear encoding error: #<Encoding::UndefinedConversionError: "\xE2\x96\x80" from UTF-8 to ISO-8859-1 in conversion from CP850 to ISO-8859-1>"
    on Tue, 3 Feb 2009 22:53:34 +0900, Tom Link <redmine@ruby-lang.org> writes:

|The test script below exits with the error: #<Encoding::UndefinedConversionError: "\xE2\x96\x80" from UTF-8 to ISO-8859-1 in conversion from CP850 to ISO-8859-1>

First, since we haven't implemented direct conversion path from CP850
to ISO-8859-1 (yet), Ruby converts strings via UTF-8, hence the
message.  If you have suggestion for better description, we are open.

Second, I couldn't reproduce the problem from your test script.  The
conversion process goes from CP850 to UTF-8, then from UTF-8 to
ISO-8859-1.  The message says resulting UTF-8 text is "\xE2\x96\x80",
which does not have corresponding character in ISO-8859-1 at all.
We have no more clue to draw any conclusion.  There are a lot of
possibilities, from a bug in your script, to a bug in Cygwin, of
course including a bug in the trancoding engine.

							matz.