From: Young Hyun <redmine@...>
Date: 2009-06-18T09:24:39+09:00
Subject: [ruby-core:23907] [Bug #1649] use of #send in MonitorMixin::extend_object fails for BasicSocket objects

Bug #1649: use of #send in MonitorMixin::extend_object fails for BasicSocket objects
http://redmine.ruby-lang.org/issues/show/1649

Author: Young Hyun
Status: Open, Priority: Normal
Category: lib, Target version: 1.9.1
ruby -v: ruby 1.9.1p129 (2009-05-12 revision 23412) [i386-freebsd6.1]

MonitorMixin::extend_object executes obj.send(:mon_initialize) with the intention of invoking Object#send.  However, this code fails when used on BasicSocket (and descendants), which has an unrelated #send.  MonitorMixin::extend_object should use __send__ or revert back to the old code: obj.instance_eval {mon_initialize()}.

Reproduce with:

>> require 'socket'
=> true
>> sock_pair = UNIXSocket.pair Socket::SOCK_STREAM, 0
=> [#<UNIXSocket:0x8401868>, #<UNIXSocket:0x840187c>]
>> require 'monitor'
=> true
>> sock_pair[1].extend MonitorMixin
ArgumentError: wrong number of arguments (1 for 2)
        from /foo/ruby-1.9.1-p129/lib/ruby/1.9.1/monitor.rb:140:in `send'
        from /foo/ruby-1.9.1-p129/lib/ruby/1.9.1/monitor.rb:140:in `extend_object'
        from (irb):7:in `extend'
        from (irb):7
        from /foo/ruby-1.9.1-p129/bin/irb:12:in `<main>'


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