[#45426] [ruby-trunk - Feature #6546][Open] Net::HTTP to check for HTTP_PROXY environment setting. — "dekz (Jacob Evans)" <dekzter@...>

14 messages 2012/06/04

[#45431] [ruby-trunk - Bug #6548][Open] Rake doesn't ignore arguments after -- — "rosenfeld (Rodrigo Rosenfeld Rosas)" <rr.rosas@...>

12 messages 2012/06/05

[#45474] [ANN] Request for "slide-show" of your feature proposal — Yusuke Endoh <mame@...>

(Japanese later; 日本語が後にあります)

18 messages 2012/06/07

[#45563] [ruby-trunk - Bug #6573][Open] Webrick test failures — "bkabrda (Bohuslav Kabrda)" <bkabrda@...>

19 messages 2012/06/11

[#45567] [ruby-trunk - Bug #6575][Open] Thread#kill sets rb_errinfo() to Fixnum 8 after rb_protect(function, data, &error_tag) — ibc (Iñaki Baz Castillo) <ibc@...>

9 messages 2012/06/11

[#45647] [ruby-trunk - Bug #6592][Open] test_call_double(DL::TestDL) fails on ARM HardFP — "vo.x (Vit Ondruch)" <v.ondruch@...>

15 messages 2012/06/14

[#45657] [ruby-trunk - Feature #6594][Open] Integrated Functor — "trans (Thomas Sawyer)" <transfire@...>

20 messages 2012/06/15

[#45664] [ruby-trunk - Bug #6596][Open] New method for Arrays : Array#index — "robin850 (Robin Dupret)" <robin.dupret@...>

20 messages 2012/06/15

[#45694] [ruby-trunk - Feature #6602][Open] Tail call optimization: enable by default? — "ko1 (Koichi Sasada)" <redmine@...>

12 messages 2012/06/18

[#45715] [ruby-trunk - Feature #6609][Open] Toplevel as self extended module — "trans (Thomas Sawyer)" <transfire@...>

17 messages 2012/06/19

[#45732] [ruby-trunk - Bug #6614][Open] GC doesn't collect objects bound to (collectable) proc — "rogerdpack (Roger Pack)" <rogerpack2005@...>

9 messages 2012/06/20

[#45733] [ruby-trunk - Feature #6615][Open] Release GVL in zlib when calling inflate() or deflate() — "drbrain (Eric Hodel)" <[email protected]>

12 messages 2012/06/21

[#45735] [ruby-trunk - Bug #6616][Open] MinGW: cannot build extensions or run tests due changes in exec_arg? — "luislavena (Luis Lavena)" <luislavena@...>

9 messages 2012/06/21

[#45798] [ruby-trunk - Bug #6634][Open] Deadlock with join and ConditionVariable — "meh. (meh. I don't care)" <meh@...>

20 messages 2012/06/23

[#45805] [ruby-trunk - Feature #6636][Open] Enumerable#size — "marcandre (Marc-Andre Lafortune)" <ruby-core@...>

15 messages 2012/06/23

[#45864] [ruby-trunk - Bug #6647][Open] Exceptions raised in threads should be logged — "headius (Charles Nutter)" <headius@...>

71 messages 2012/06/25

[#45902] [ruby-trunk - Bug #6653][Open] 1.9.2/1.9.3 exhibit SEGV with many threads+tcp connections — "erikh (Erik Hollensbe)" <erik@...>

11 messages 2012/06/26

[#45960] [ruby-trunk - Feature #6669][Open] A method like Hash#map but returns hash — "yhara (Yutaka HARA)" <redmine@...>

18 messages 2012/06/29

[#45963] [ruby-trunk - Feature #6670][Open] str.chars.last should be possible — "yhara (Yutaka HARA)" <redmine@...>

36 messages 2012/06/29

[#46021] [ruby-trunk - Feature #6679][Open] Default Ruby source file encoding to utf-8 — "claytrump (Clay Trump)" <clay.trump@...>

21 messages 2012/06/30

[ruby-core:45601] [ruby-trunk - Bug #6580][Rejected] Assigning a value to a single element in an array that is contained in an array of arrays, updates the element in that position in all of the contained arrays

From: "nobu (Nobuyoshi Nakada)" <nobu@...>
Date: 2012-06-12 20:13:19 UTC
List: ruby-core #45601
Issue #6580 has been updated by nobu (Nobuyoshi Nakada).

Status changed from Open to Rejected


----------------------------------------
Bug #6580: Assigning a value to a single element in an array that is contained in an array of arrays, updates the element in that position in all of the contained arrays
https://bugs.ruby-lang.org/issues/6580#change-27199

Author: jmoline (James Moline)
Status: Rejected
Priority: Normal
Assignee: 
Category: 
Target version: 
ruby -v: ruby 1.9.3p0 (2011-10-30 revision 33570) [x86_64-darwin10.8.0]


=begin
Came across this bug the other day in both 1.8 and 1.9.3. It seems like it would have been discovered before, but I can't find anywhere that it has been reported.

Basically, when you have an array of arrays, and you attempt to assign a value to a single element of one of those arrays, it assigns the value to that element in all of the arrays.

Example:

(({arr = Array.new(5, Array.new(5))}))

  [
    [nil, nil, nil, nil, nil],
    [nil, nil, nil, nil, nil],
    [nil, nil, nil, nil, nil],
    [nil, nil, nil, nil, nil],
    [nil, nil, nil, nil, nil]
  ]

(({arr[0][0] = 3}))

  [
    [3, nil, nil, nil, nil],
    [3, nil, nil, nil, nil],
    [3, nil, nil, nil, nil],
    [3, nil, nil, nil, nil],
    [3, nil, nil, nil, nil],
  ]

(({arr[2][3] = "test"}))

  [
    [3, nil, nil, "test", nil],
    [3, nil, nil, "test", nil],
    [3, nil, nil, "test", nil],
    [3, nil, nil, "test", nil],
    [3, nil, nil, "test", nil],
  ]
=end


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