Issue #10016 has been updated by Tomoyuki Chikanaga.

Backport changed from 2.0.0: REQUIRED, 2.1: REQUIRED to 2.0.0: REQUIRED, 2.1: DONE

Backported into `ruby_2_1` branch at r47138.

----------------------------------------
Bug #10016: Destructuring block arguments with a Hashable last element
https://bugs.ruby-lang.org/issues/10016#change-48281

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

~~~ruby
# 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?





-- 
https://bugs.ruby-lang.org/