[#44036] [ruby-trunk - Feature #6242][Open] Ruby should support lists — "shugo (Shugo Maeda)" <redmine@...>
20 messages
2012/04/01
[#44084] [ruby-trunk - Bug #6246][Open] 1.9.3-p125 intermittent segfault — "jshow (Jodi Showers)" <jodi@...>
22 messages
2012/04/02
[#44156] [ruby-trunk - Feature #6265][Open] Remove 'useless' 'concatenation' syntax — "rosenfeld (Rodrigo Rosenfeld Rosas)" <rr.rosas@...>
45 messages
2012/04/06
[#44207] [ruby-trunk - Feature #6265] Remove 'useless' 'concatenation' syntax
— "mame (Yusuke Endoh)" <mame@...>
2012/04/09
[#44211] Re: [ruby-trunk - Feature #6265] Remove 'useless' 'concatenation' syntax
— Yukihiro Matsumoto <matz@...>
2012/04/09
Hi,
[#44232] Re: [ruby-trunk - Feature #6265] Remove 'useless' 'concatenation' syntax
— SASADA Koichi <ko1@...>
2012/04/09
(2012/04/09 14:19), Yukihiro Matsumoto wrote:
[#44163] [ruby-trunk - Bug #6266][Open] encoding related exception with recent integrated psych — "jonforums (Jon Forums)" <redmine@...>
10 messages
2012/04/06
[#44233] [ruby-trunk - Bug #6274][Open] Float addition incorrect — "swanboy (Michael Swan)" <swanyboy4@...>
3 messages
2012/04/09
[#44303] [ruby-trunk - Feature #6284][Open] Add composition for procs — "pabloh (Pablo Herrero)" <pablodherrero@...>
57 messages
2012/04/12
[#44329] [ruby-trunk - Feature #6287][Open] nested method should only be visible by nesting/enclosing method — "botp (bot pena)" <botpena@...>
4 messages
2012/04/13
[#44349] [ruby-trunk - Feature #6293][Open] new queue / blocking queues — "tenderlovemaking (Aaron Patterson)" <aaron@...>
10 messages
2012/04/13
[#44354] [ruby-trunk - Feature #6293][Assigned] new queue / blocking queues
— "mame (Yusuke Endoh)" <mame@...>
2012/04/14
[#44357] Re: [ruby-trunk - Feature #6293][Assigned] new queue / blocking queues
— Aaron Patterson <tenderlove@...>
2012/04/14
On Sat, Apr 14, 2012 at 10:58:12AM +0900, mame (Yusuke Endoh) wrote:
[#44384] Re: [ruby-trunk - Feature #6293][Assigned] new queue / blocking queues
— SASADA Koichi <ko1@...>
2012/04/16
Hi,
[#44391] Re: [ruby-trunk - Feature #6293][Assigned] new queue / blocking queues
— Aaron Patterson <tenderlove@...>
2012/04/16
On Mon, Apr 16, 2012 at 06:25:59PM +0900, SASADA Koichi wrote:
[#44372] Possible merge error of code in Issue 4651 on to Ruby 1.9.3-p125? — "Blythe,Aaron" <ABLYTHE@...>
tl;dr I believe I have uncovered a merge error to ruby 1.9.3-p125 from Issu=
3 messages
2012/04/16
[#44431] [Backport93 - Backport #6314][Open] Backport r35374 and r35375 — "drbrain (Eric Hodel)" <[email protected]>
4 messages
2012/04/18
[#44432] [ruby-trunk - Feature #6315][Open] handler to trace output of each line of code executed — "ankopainting (Anko Painting)" <anko.com+ruby@...>
9 messages
2012/04/18
[#44533] [ruby-trunk - Bug #6341][Open] SIGSEGV: Thread.new { fork { GC.start } }.join — "rudolf (r stu3)" <redmine@...>
24 messages
2012/04/22
[#44564] [ruby-trunk - Bug #6341] SIGSEGV: Thread.new { fork { GC.start } }.join
— "kosaki (Motohiro KOSAKI)" <kosaki.motohiro@...>
2012/04/23
[#44573] Re: [ruby-trunk - Bug #6341] SIGSEGV: Thread.new { fork { GC.start } }.join
— Yusuke Endoh <mame@...>
2012/04/24
Hello,
[#44577] Re: [ruby-trunk - Bug #6341] SIGSEGV: Thread.new { fork { GC.start } }.join
— KOSAKI Motohiro <kosaki.motohiro@...>
2012/04/24
On Mon, Apr 23, 2012 at 11:17 PM, Yusuke Endoh <[email protected]> wrote:
[#44582] Re: [ruby-trunk - Bug #6341] SIGSEGV: Thread.new { fork { GC.start } }.join
— Yusuke Endoh <mame@...>
2012/04/24
Hello,
[#44596] Re: [ruby-trunk - Bug #6341] SIGSEGV: Thread.new { fork { GC.start } }.join
— KOSAKI Motohiro <kosaki.motohiro@...>
2012/04/24
(4/24/12 6:55 AM), Yusuke Endoh wrote:
[#44579] [ruby-trunk - Bug #6341] SIGSEGV: Thread.new { fork { GC.start } }.join
— "naruse (Yui NARUSE)" <naruse@...>
2012/04/24
[#44581] Re: [ruby-trunk - Bug #6341] SIGSEGV: Thread.new { fork { GC.start } }.join
— KOSAKI Motohiro <kosaki.motohiro@...>
2012/04/24
> kosaki (Motohiro KOSAKI) wrote:
[#44540] [ruby-trunk - Bug #6343][Open] Improved Fiber documentation — "andhapp (Anuj Dutta)" <anuj@...>
6 messages
2012/04/23
[#44612] [ruby-trunk - Feature #6354][Open] Remove escape (break/return/redo/next support) from class/module scope — "ko1 (Koichi Sasada)" <redmine@...>
8 messages
2012/04/25
[#44630] [ruby-trunk - Feature #6361][Open] Bitwise string operations — "MartinBosslet (Martin Bosslet)" <Martin.Bosslet@...>
31 messages
2012/04/26
[#44713] [ruby-trunk - Feature #6361] Bitwise string operations
— "MartinBosslet (Martin Bosslet)" <Martin.Bosslet@...>
2012/04/28
[#44731] Re: [ruby-trunk - Feature #6361] Bitwise string operations
— KOSAKI Motohiro <kosaki.motohiro@...>
2012/04/28
On Fri, Apr 27, 2012 at 8:53 PM, MartinBosslet (Martin Bosslet)
[#44759] Re: [ruby-trunk - Feature #6361] Bitwise string operations
— Joshua Ballanco <jballanc@...>
2012/04/29
On Saturday, April 28, 2012 at 8:52 AM, KOSAKI Motohiro wrote:
[#44636] [ruby-trunk - Bug #6364][Open] Segmentation fault happend when running test_cptr.rb — "raylinn@... (ray linn)" <raylinn@...>
9 messages
2012/04/26
[#44667] possible YAML bug in ruby 1.9.3p125? — Young Hyun <youngh@...>
YAML in ruby 1.9.3p125 seems to have a bug reading in YAML from older =
4 messages
2012/04/27
[#44686] [BUG] not a node 0x07 — ronald braswell <rpbraswell@...>
Running ruby 1.8.6 on Solaris 10.
7 messages
2012/04/27
[#44688] Re: [BUG] not a node 0x07
— "NARUSE, Yui" <naruse@...>
2012/04/27
2012/4/28 ronald braswell <[email protected]>:
[#44694] Re: [BUG] not a node 0x07
— ronald braswell <rpbraswell@...>
2012/04/27
I have heard reports of this on 1.9.x. Do you know if this problem has
[#44704] [ruby-trunk - Feature #6373][Open] public #self — "trans (Thomas Sawyer)" <transfire@...>
61 messages
2012/04/27
[#44735] [ruby-trunk - Feature #6373] public #self
— "matz (Yukihiro Matsumoto)" <matz@...>
2012/04/28
[#59892] [ruby-trunk - Feature #6373] public #self
— ruby-core@...
2014/01/20
Issue #6373 has been updated by Marc-Andre Lafortune.
[#44743] [ruby-trunk - Feature #6375][Open] Python notation for literal Hash — "alexeymuranov (Alexey Muranov)" <redmine@...>
10 messages
2012/04/28
[#44748] [ruby-trunk - Feature #6376][Open] Feature lookup and checking if feature is loaded — "trans (Thomas Sawyer)" <transfire@...>
13 messages
2012/04/28
[#44832] [ruby-trunk - Feature #6376][Feedback] Feature lookup and checking if feature is loaded
— "mame (Yusuke Endoh)" <mame@...>
2012/05/03
[#44835] Re: [ruby-trunk - Feature #6376][Feedback] Feature lookup and checking if feature is loaded
— Nikolai Weibull <now@...>
2012/05/03
On Thu, May 3, 2012 at 6:02 AM, mame (Yusuke Endoh) <[email protected]> wrote:
[ruby-core:44219] [ruby-trunk - Feature #4168][Closed] WeakRef is unsafe to use in Ruby 1.9
From:
"nobu (Nobuyoshi Nakada)" <nobu@...>
Date:
2012-04-09 12:51:42 UTC
List:
ruby-core #44219
Issue #4168 has been updated by nobu (Nobuyoshi Nakada).
Status changed from Assigned to Closed
I believe so.
If something goes wrong, please reopen this or file a new ticket.
----------------------------------------
Feature #4168: WeakRef is unsafe to use in Ruby 1.9
https://bugs.ruby-lang.org/issues/4168#change-25746
Author: bdurand (Brian Durand)
Status: Closed
Priority: Normal
Assignee: nobu (Nobuyoshi Nakada)
Category: lib
Target version: 2.0.0
=begin
I've found a couple issues with the implementation of WeakRef in Ruby 1.9.
1. WeakRef is unsafe to use because the ObjectSpace will recycle object ids for use with newly allocated objects after the old objects have been garbage collected. This problem was not present in 1.8, but with the 1.9 threading improvements there is no guarantee that the garbage collector thread has finished running the finalizers before new objects are allocated. This can result in a WeakRef returning a different object than the one it originally referenced.
2. In Ruby 1.9 a Mutex is used to synchronize access to the shared data structures. However, Mutexes are not reentrant and the finalizers are silently throwing deadlock errors if they run while new WeakRefs are being created.
I've included in my patch a reimplementation of WeakRef called WeakReference that does not extend Delegator. This code is based on the original WeakRef code but has been rewritten so the variable names are a little clearer. It replaces the Mutex with a Monitor and adds an additional check to make sure that the object returned by the reference is the same one it originally referred to. WeakRef is rewritten as a Delegator wrapper around a WeakReference for backward compatibility.
I went this route because in some Ruby implementations (like Ruby 1.8), Delegator is very heavy weight to instantiate and creating a collection of thousands of WeakRefs will be slow and use up far too much memory (in fact, it would be nice to either backport this patch to Ruby 1.8 or the delegate changes from 1.9 to 1.8 if possible). I also don't really see the value of having weak references be delegators since is very unsafe to do anything without wrapping the call in a "rescue RefError" block. The object can be reclaimed at any time so the only safe method to be sure you still have it is to create a strong reference to the object at which point you might as well use that reference instead of the delegated methods on the WeakRef. It also should be simpler for other implementations of Ruby like Jruby or Rubinius to map native weak references to a simpler interface.
Sample code with WeakReference
orig = Object.new
ref = WeakReference.new(orig)
# ...
obj = ref.object
if obj
# Do something
end
I also have a version of the patch which just fixes WeakRef to work without introducing a new class, but I feel this version is the right way to go.
Also included are unit tests for weak references but the test that checks for the broken functionality is not 100% reliable since garbage collection is not deterministic. I've also included a script that shows the problem in more detail with the existing weak reference implementation.
ruby show_bug.rb 100000 # Run 100,000 iterations on the current implementation of WeakRef and report any problems
ruby -I. show_bug.rb 100000 # Run 100,000 iterations on the new implementation of WeakRef and report any problems
=end
--
http://bugs.ruby-lang.org/