JRuby

[1.9] [RubySpec] In 1.9 mode, for should yield only as many values as there are arguments

Details

  • Type: Bug Bug
  • Status: Open Open
  • Priority: Major Major
  • Resolution: Unresolved
  • Affects Version/s: JRuby 1.6.6, JRuby 1.7.0.pre1
  • Fix Version/s: JRuby 1.7.4
  • Component/s: Ruby 1.9.3, RubySpec
  • Labels:
    None
  • Environment:
    export JRUBY_OPTS=--1.9
  • Number of attachments :
    0

Description

In MRI 1.9.2:

      class OFor
        def each
          [[1,2,3], [4,5,6]].each do |a|
            yield(a[0],a[1],a[2])
          end
        end
      end
      o = OFor.new
      qs = []
      for q in o
        qs << q
      end

This snippet comes from rubyspec/language/for_spec.rb; in MRI 1.9.2, qs gets [1, 4].

Activity

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Martin Harriman added a comment -

In jruby, qs gets [[1, 2, 3], [4, 5, 6]].

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Martin Harriman added a comment - In jruby, qs gets [ [1, 2, 3] , [4, 5, 6] ].
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Hiro Asari added a comment - 
1)
The for expression yields only as many values as there are arguments FAILED
Expected [[1, 2, 3], [4, 5, 6]]
 to equal [1, 4]

/Users/asari/Development/src/jruby/spec/ruby/language/for_spec.rb:99:in `(root)'
org/jruby/RubyBasicObject.java:1753:in `instance_eval'
org/jruby/RubyEnumerable.java:1313:in `all?'
org/jruby/RubyArray.java:1596:in `each'
/Users/asari/Development/src/jruby/spec/ruby/language/for_spec.rb:6:in `(root)'
org/jruby/RubyKernel.java:996:in `load'
/Users/asari/Development/src/jruby/spec/ruby/language/for_spec.rb:56:in `files'
org/jruby/RubyBasicObject.java:1753:in `instance_eval'
org/jruby/RubyArray.java:1596:in `each'
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Hiro Asari added a comment - 1) The for expression yields only as many values as there are arguments FAILED Expected [[1, 2, 3], [4, 5, 6]] to equal [1, 4] /Users/asari/Development/src/jruby/spec/ruby/language/for_spec.rb:99:in `(root)' org/jruby/RubyBasicObject.java:1753:in `instance_eval' org/jruby/RubyEnumerable.java:1313:in `all?' org/jruby/RubyArray.java:1596:in `each' /Users/asari/Development/src/jruby/spec/ruby/language/for_spec.rb:6:in `(root)' org/jruby/RubyKernel.java:996:in `load' /Users/asari/Development/src/jruby/spec/ruby/language/for_spec.rb:56:in `files' org/jruby/RubyBasicObject.java:1753:in `instance_eval' org/jruby/RubyArray.java:1596:in `each'
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Charles Oliver Nutter added a comment -

This is likely another bug that will be fixed by argument-splatting improvements intended to go into 1.6.6.

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Charles Oliver Nutter added a comment - This is likely another bug that will be fixed by argument-splatting improvements intended to go into 1.6.6.
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Charles Oliver Nutter added a comment -

Still broken in 1.6.6. Investigating a bit today. Likely specific to the "for" logic.

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Charles Oliver Nutter added a comment - Still broken in 1.6.6. Investigating a bit today. Likely specific to the "for" logic.
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Charles Oliver Nutter added a comment -

Does not work with each either. Seems to be some case we missed?

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Charles Oliver Nutter added a comment - Does not work with each either. Seems to be some case we missed?
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Charles Oliver Nutter added a comment -

Oops, I was mistaken...not running in 1.9 mode. It does only fail with "for".

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Charles Oliver Nutter added a comment - Oops, I was mistaken...not running in 1.9 mode. It does only fail with "for".
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Charles Oliver Nutter added a comment -

Ok, here's the deal. We separate logic for 1.9 versus 1.8 blocks, but we don't do the same for `for` loops. It shouldn't be hard to do that, but we need the parser to do the right thing here. I'll talk to Tom today about getting parser help, and this should make 1.6.7.

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Charles Oliver Nutter added a comment - Ok, here's the deal. We separate logic for 1.9 versus 1.8 blocks, but we don't do the same for `for` loops. It shouldn't be hard to do that, but we need the parser to do the right thing here. I'll talk to Tom today about getting parser help, and this should make 1.6.7.
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Thomas E Enebo added a comment -

It sucks to punt this to 1.7.0, but the underlying issue is ForBlock is written in terms of the production lhs and mlhs which are written in *AsgnNode. Our 1.9 block implementation and compiler are written around them being wrapped in an ArgsNode and being ArgumentNodes. Massive changes are needed to make this work, so I don't think we should attempt this late into the 1.6.x cycle. High priority for 1.7.0 though.

If at all possible please rewrite your code to use 'each' instead of 'for'.

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Thomas E Enebo added a comment - It sucks to punt this to 1.7.0, but the underlying issue is ForBlock is written in terms of the production lhs and mlhs which are written in *AsgnNode. Our 1.9 block implementation and compiler are written around them being wrapped in an ArgsNode and being ArgumentNodes. Massive changes are needed to make this work, so I don't think we should attempt this late into the 1.6.x cycle. High priority for 1.7.0 though. If at all possible please rewrite your code to use 'each' instead of 'for'.
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Charles Oliver Nutter added a comment -

Still broken for 1.7.0. Bumping to 1.7.1.

system ~/projects/jruby $ jruby test.rb
test.rb:5 warning: multiple values for a block parameter (3 for 1)
test.rb:5 warning: multiple values for a block parameter (3 for 1)
[[1, 2, 3], [4, 5, 6]]

system ~/projects/jruby $ jruby -X-C test.rb
[[1, 2, 3], [4, 5, 6]]

system ~/projects/jruby $ jruby -X-CIR test.rb
[1, 4]
Show
Charles Oliver Nutter added a comment - Still broken for 1.7.0. Bumping to 1.7.1. system ~/projects/jruby $ jruby test.rb test.rb:5 warning: multiple values for a block parameter (3 for 1) test.rb:5 warning: multiple values for a block parameter (3 for 1) [[1, 2, 3], [4, 5, 6]] system ~/projects/jruby $ jruby -X-C test.rb [[1, 2, 3], [4, 5, 6]] system ~/projects/jruby $ jruby -X-CIR test.rb [1, 4]

People

  • Assignee:
    Thomas E Enebo
    Reporter:
    Martin Harriman
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Dates

  • Created:
    Updated: