From: nobu@...
Date: 2014-08-31T23:50:50+00:00
Subject: [ruby-core:64695] [ruby-trunk - Bug #10190] Segmentation fault when Thread::Queue#push is called through dRuby

Issue #10190 has been updated by Nobuyoshi Nakada.

Duplicates Bug #9674: Segfault when marshaling Queue added

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Bug #10190: Segmentation fault when Thread::Queue#push is called through dRuby
https://bugs.ruby-lang.org/issues/10190#change-48593

* Author: Yuichi TANIKAWA
* Status: Open
* Priority: Normal
* Assignee: 
* Category: 
* Target version: 
* ruby -v: ruby 2.1.2p95 (2014-05-08 revision 45877) [x86_64-linux]
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN
----------------------------------------
I found a segmentation fault when `Thread::Queue` is attached to a dRuby server as a front object and `#push` is called from a dRuby client.
Here are programs, a procedure and logs.

## server.rb
~~~
require 'drb/drb'
require 'thread'

q = Queue.new
DRb.start_service('druby://localhost:12345', q)
DRb.thread.join
~~~

## client.rb
~~~
require 'drb/drb'
require 'thread'

DRb.start_service
q = DRbObject.new_with_uri('druby://localhost:12345')
q.push 1
~~~

## procedure
~~~
$ ruby server.rb

# in another terminal
$ ruby client.rb
~~~

## server.rb log
~~~
/home/itiut/.linuxbrew/var/rbenv/versions/2.1.2/lib/ruby/2.1.0/drb/drb.rb:562: [BUG] Segmentation fault at 0x00000000000018
ruby 2.1.2p95 (2014-05-08 revision 45877) [x86_64-linux]
~~~

## client.rb log
~~~
/home/itiut/.linuxbrew/var/rbenv/versions/2.1.2/lib/ruby/2.1.0/drb/drb.rb:575:in `load': connection closed (DRb::DRbConnError)
        from /home/itiut/.linuxbrew/var/rbenv/versions/2.1.2/lib/ruby/2.1.0/drb/drb.rb:637:in `recv_reply'
        from /home/itiut/.linuxbrew/var/rbenv/versions/2.1.2/lib/ruby/2.1.0/drb/drb.rb:936:in `recv_reply'
        from /home/itiut/.linuxbrew/var/rbenv/versions/2.1.2/lib/ruby/2.1.0/drb/drb.rb:1222:in `send_message'
        from /home/itiut/.linuxbrew/var/rbenv/versions/2.1.2/lib/ruby/2.1.0/drb/drb.rb:1110:in `block (2 levels) in method_missing'
        from /home/itiut/.linuxbrew/var/rbenv/versions/2.1.2/lib/ruby/2.1.0/drb/drb.rb:1197:in `open'
        from /home/itiut/.linuxbrew/var/rbenv/versions/2.1.2/lib/ruby/2.1.0/drb/drb.rb:1109:in `block in method_missing'
        from /home/itiut/.linuxbrew/var/rbenv/versions/2.1.2/lib/ruby/2.1.0/drb/drb.rb:1128:in `with_friend'
        from /home/itiut/.linuxbrew/var/rbenv/versions/2.1.2/lib/ruby/2.1.0/drb/drb.rb:1108:in `method_missing'
        from client.rb:5:in `<main>'
~~~


I tried executing the procedure many times but the server's log contained detailed information only once or twice. 
Fortunately I found it in a terminal scrollback buffer, so I attach it.


---Files--------------------------------
server.log (13.8 KB)


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