JRuby

Randomly changed hash key in overriden []= method in Hash inherited class

Details

  • Type: Bug Bug
  • Status: Resolved Resolved
  • Priority: Major Major
  • Resolution: Fixed
  • Affects Version/s: JRuby 1.6.2, JRuby 1.6.4
  • Fix Version/s: JRuby 1.7.0.pre1
  • Component/s: Core Classes/Modules
  • Labels:
    None
  • Environment:
    Ubuntu 10.04 (2.6.32-33)
    java 1.6.0_26-b03
  • Number of attachments :
    0

Description

Found this problem trying to run Machinist v2.0.0beta2 but it happens in irb as well.
Here is a snippet I ran in a console. In my environment it randomly fails on 48th-49th iteration. After self[*keys] = [] empty array get added to keys and having the key is changed super(key) returns nil.

class AA < Hash
  def []=(*keys)
    value = keys.pop
    super(keys, value)
  end

  def [](*keys)
    if !has_key?(keys)
      p keys
      self[*keys] = []
      p keys
    end
    super(keys)
  end
end

def go(h,count)
  count.times do |i|
    key=[i,i]
    h[key]<<i
  end
end

go(AA.new, 100)

Activity

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Hiro Asari added a comment -

Can you check this with the master? You can grab a snapshot from http://ci.jruby.org/snapshots/ It appears to be fixed there.

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Hiro Asari added a comment - Can you check this with the master? You can grab a snapshot from http://ci.jruby.org/snapshots/ It appears to be fixed there.
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Ivan Vystoskiy added a comment -

Yes, I can confirm that it is fixed in jruby-1.7.0.dev
Thanks!

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Ivan Vystoskiy added a comment - Yes, I can confirm that it is fixed in jruby-1.7.0.dev Thanks!

People

  • Assignee:
    Unassigned
    Reporter:
    Ivan Vystoskiy
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Dates

  • Created:
    Updated:
    Resolved: