Backport #8054: open-uri と resolv-replace を同時にロードすると壊れる

[Kenta Murata]

以下のように、open-uri と resolv-replace を同時にロードすると壊れます。

$ ruby -ropen-uri -rresolv-replace -ve 'open("http://www.ruby-lang.org/")'
ruby 2.0.0p0 (2013-02-24 revision 39474) [x86_64-darwin12.2.0]
/Users/kenta-murata/.rbenv/versions/2.0.0-p0/lib/ruby/2.0.0/resolv.rb:1176:in create': cannot interpret as DNS name: nil (ArgumentError)
from /Users/kenta-murata/.rbenv/versions/2.0.0-p0/lib/ruby/2.0.0/resolv.rb:1022:ingenerate_candidates'
from /Users/kenta-murata/.rbenv/versions/2.0.0-p0/lib/ruby/2.0.0/resolv.rb:1047:in resolv'
from /Users/kenta-murata/.rbenv/versions/2.0.0-p0/lib/ruby/2.0.0/resolv.rb:513:ineach_resource'
from /Users/kenta-murata/.rbenv/versions/2.0.0-p0/lib/ruby/2.0.0/resolv.rb:406:in each_address'
from /Users/kenta-murata/.rbenv/versions/2.0.0-p0/lib/ruby/2.0.0/resolv.rb:115:inblock in each_address'
from /Users/kenta-murata/.rbenv/versions/2.0.0-p0/lib/ruby/2.0.0/resolv.rb:114:in each'
from /Users/kenta-murata/.rbenv/versions/2.0.0-p0/lib/ruby/2.0.0/resolv.rb:114:ineach_address'
from /Users/kenta-murata/.rbenv/versions/2.0.0-p0/lib/ruby/2.0.0/resolv.rb:92:in getaddress'
from /Users/kenta-murata/.rbenv/versions/2.0.0-p0/lib/ruby/2.0.0/resolv.rb:43:ingetaddress'
from /Users/kenta-murata/.rbenv/versions/2.0.0-p0/lib/ruby/2.0.0/resolv-replace.rb:10:in getaddress'
from /Users/kenta-murata/.rbenv/versions/2.0.0-p0/lib/ruby/2.0.0/resolv-replace.rb:22:ininitialize'
from /Users/kenta-murata/.rbenv/versions/2.0.0-p0/lib/ruby/2.0.0/net/http.rb:877:in open'
from /Users/kenta-murata/.rbenv/versions/2.0.0-p0/lib/ruby/2.0.0/net/http.rb:877:inblock in connect'
from /Users/kenta-murata/.rbenv/versions/2.0.0-p0/lib/ruby/2.0.0/timeout.rb:51:in timeout'
from /Users/kenta-murata/.rbenv/versions/2.0.0-p0/lib/ruby/2.0.0/net/http.rb:876:inconnect'
from /Users/kenta-murata/.rbenv/versions/2.0.0-p0/lib/ruby/2.0.0/net/http.rb:861:in do_start'
from /Users/kenta-murata/.rbenv/versions/2.0.0-p0/lib/ruby/2.0.0/net/http.rb:850:instart'
from /Users/kenta-murata/.rbenv/versions/2.0.0-p0/lib/ruby/2.0.0/open-uri.rb:313:in open_http'
from /Users/kenta-murata/.rbenv/versions/2.0.0-p0/lib/ruby/2.0.0/open-uri.rb:708:inbuffer_open'
from /Users/kenta-murata/.rbenv/versions/2.0.0-p0/lib/ruby/2.0.0/open-uri.rb:210:in block in open_loop'
from /Users/kenta-murata/.rbenv/versions/2.0.0-p0/lib/ruby/2.0.0/open-uri.rb:208:incatch'
from /Users/kenta-murata/.rbenv/versions/2.0.0-p0/lib/ruby/2.0.0/open-uri.rb:208:in open_loop'
from /Users/kenta-murata/.rbenv/versions/2.0.0-p0/lib/ruby/2.0.0/open-uri.rb:149:inopen_uri'
from /Users/kenta-murata/.rbenv/versions/2.0.0-p0/lib/ruby/2.0.0/open-uri.rb:688:in open'
from /Users/kenta-murata/.rbenv/versions/2.0.0-p0/lib/ruby/2.0.0/open-uri.rb:34:inopen'
from -e:1:in `'

[Kenta Murata]

以下のような修正で正しく動いてるようです:

diff --git a/lib/resolv-replace.rb b/lib/resolv-replace.rb
index ff34f90..374c81a 100644
--- a/lib/resolv-replace.rb
+++ b/lib/resolv-replace.rb
@@ -18,9 +18,9 @@ class TCPSocket < IPSocket
# :stopdoc:
alias original_resolv_initialize initialize
# :startdoc:
- def initialize(host, serv, *rest)
- rest[0] = IPSocket.getaddress(rest[0]) unless rest.empty?
- original_resolv_initialize(IPSocket.getaddress(host), serv, *rest)
+ def initialize(host, serv, local_host=nil, local_serv=nil)
+ local_host = IPSocket.getaddress(local_host) if local_host
+ original_resolv_initialize(IPSocket.getaddress(host), serv, local_host, local_serv)
end
end

[Kenta Murata]

この問題が起きるようになったのは r36367 の変更からだと思います。
r36367 より、Net::HTTP#connect で、TCPSocket.open の第3引数と第4引数が
必ず明示的に渡されるようになりました。
この変更に対して resolv-replace.rb が追従していません。
resolv-replace のテスト無かったから気づかなかったんでしょうね。

[Akira Tanaka]

• Status changed from Open to Closed
• % Done changed from 0 to 100

This issue was solved with changeset r39725.
Kenta, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.

---

• lib/resolv-replace.rb (TCPSocket#initialize): resolve the 3rd argument only if non-nil value is given. [ruby-trunk - Bug #8054] reported and analyzed by mrkn.

[Akira Tanaka]

2013/3/11 mrkn (Kenta Murata) [e-mail]:

Issue #8054 has been updated by mrkn (Kenta Murata).

以下のような修正で正しく動いてるようです:

diff --git a/lib/resolv-replace.rb b/lib/resolv-replace.rb
index ff34f90..374c81a 100644
--- a/lib/resolv-replace.rb
+++ b/lib/resolv-replace.rb
@@ -18,9 +18,9 @@ class TCPSocket < IPSocket
# :stopdoc:
alias original_resolv_initialize initialize
# :startdoc:
- def initialize(host, serv, *rest)
- rest[0] = IPSocket.getaddress(rest[0]) unless rest.empty?
- original_resolv_initialize(IPSocket.getaddress(host), serv, *rest)
+ def initialize(host, serv, local_host=nil, local_serv=nil)
+ local_host = IPSocket.getaddress(local_host) if local_host
+ original_resolv_initialize(IPSocket.getaddress(host), serv, local_host, local_serv)
end
end

引数の数を変えるのもなんなので、r39725 という感じで。
--
[田中 哲][たなか あきら][Tanaka Akira]

[Tomoyuki Chikanaga]

• Tracker changed from Bug to Backport
• Project changed from Ruby trunk to Backport200
• Category deleted (lib)
• Status changed from Closed to Assigned
• Assignee changed from Akira Tanaka to Tomoyuki Chikanaga

[Tomoyuki Chikanaga]

• Status changed from Assigned to Closed

This issue was solved with changeset r40089.
Kenta, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.

---

merge revision(s) 39725: [Backport #8054]

* lib/resolv-replace.rb (TCPSocket#initialize): resolve the 3rd
  argument only if non-nil value is given.
   [ruby-trunk - Bug #8054] reported and analyzed by
  mrkn.