From: Vladimir Sizikov <vsizikov@...>
Date: 2008-01-16T05:34:15+09:00
Subject: Incorrect Date.to_s behavior

Hi,

There was a bug report against JRuby, which turned out against MRI as well.

The following simple example:
require 'date'; Date.new.freeze.to_s

Produces:

TypeError: can't modify frozen object
        from (eval):4:in `jd'
        from /usr/lib/ruby/1.8/date.rb:1041:in `__21769__'
        from (eval):4:in `civil'
        from /usr/lib/ruby/1.8/date.rb:1056:in `year'
        from /usr/lib/ruby/1.8/date/format.rb:230:in `strftime'
        from /usr/lib/ruby/1.8/date/format.rb:201:in `gsub'
        from /usr/lib/ruby/1.8/date/format.rb:201:in `strftime'
        from /usr/lib/ruby/1.8/date.rb:1343:in `to_s'

On both, 1.8.6 and 1.9.0, but was working correctly on 1.8.5.

Ideally, it seems, to_s should not really modify the object,
or am I missing something?

Thanks,
  --Vladimir