Issue #10016 has been reported by Brian Shirai.

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Bug #10016: Destructuring block arguments with a Hashable last element
https://bugs.ruby-lang.org/issues/10016

* Author: Brian Shirai
* Status: Open
* Priority: Normal
* Assignee: 
* Category: 
* Target version: 
* ruby -v: ruby 2.2.0dev (2014-06-05 trunk 46353) [x86_64-darwin13]
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN
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The following code:

# destructure_bug.rb
def m
  x = Object.new
  def x.to_hash() {x: 9} end

  yield [1, 2, 3, x]
end

p m { |a, *b, c, **k| [a, b, c, k] }

gives:

$ ruby -v destructure_bug.rb
ruby 2.1.2p95 (2014-05-08 revision 45877) [x86_64-darwin13.0]
[#<Object:0x007fc5fb212870>, [nil], 1, {:x=>9}]

$ ruby -v destructure_bug.rb
ruby 2.2.0dev (2014-06-05 trunk 46353) [x86_64-darwin13]
[#<Object:0x007f88c206c2a8>, [nil], 1, {:x=>9}]

I would expect: [1, [2], 3, {:x=>9}]

Is this a bug?





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