From: Kazuhiro NISHIYAMA <redmine@...>
Date: 2009-08-12T05:07:21+09:00
Subject: [ruby-dev:39069] [Bug #1929] str.dup.force_encodingが元のstrに影響を与えることがある

チケット #1929 が更新されました。 (by Kazuhiro NISHIYAMA)


まだ長いように思いますが、単体で再現できるものができたので送っておきます。

% cat c.rb
#!/usr/bin/env ruby-trunk
# -*- coding: utf-8 -*-
require 'pstore'
require 'cgi'
require 'erb'

def cache_file(c)
  'c.db'
end

params = CGI::parse("category=%E3%81%A6%E3%81%99%E3%81%A8")
categories = params['category']
categorized = {}
$dump_categorized = proc do |file, line|
  $stderr.puts [file, line, categories.map{|e|[e[0].object_id, e[0].encoding]}].inspect
  $stderr.puts [file, line, categorized.map{|e|[e[0].object_id, e[0].encoding]}].inspect
end
$dump_categorized[__FILE__, __LINE__]
categories.each do |c|
  PStore.new(cache_file(c)).transaction do |db|
    categorized[c] = db['category']
    db.abort
  end
end

$dump_categorized[__FILE__, __LINE__]
categorized.keys.each do |c|
  PStore.new(cache_file(c)).transaction do |db|
    db['category'] = {} unless db.root?('category')
    db['category'].update(categorized[c] || {})
  end
end
$dump_categorized[__FILE__, __LINE__]
categories.map{|e|ERB::Util.u(e)}
$dump_categorized[__FILE__, __LINE__]
% ruby-trunk c.rb -v
["c.rb", 18, [[10938200, #<Encoding:UTF-8>]]]
["c.rb", 18, []]
["c.rb", 26, [[10937000, #<Encoding:UTF-8>]]]
["c.rb", 26, [[10937100, #<Encoding:UTF-8>]]]
["c.rb", 33, [[10935120, #<Encoding:UTF-8>]]]
["c.rb", 33, [[10937100, #<Encoding:UTF-8>]]]
["c.rb", 35, [[10932440, #<Encoding:UTF-8>]]]
["c.rb", 35, [[10937100, #<Encoding:ASCII-8BIT>]]]
% ruby-trunk -v
ruby 1.9.2dev (2009-08-07 trunk 24439) [x86_64-linux]
%
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http://redmine.ruby-lang.org/issues/show/1929

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http://redmine.ruby-lang.org