Bug #10016: Destructuring block arguments with a Hashable last element

• Status: Closed
• Assignee: -
• Target version: 2.2.0
• ruby -v: ruby 2.2.0dev (2014-06-05 trunk 46353) [x86_64-darwin13]
• Backport: 2.0.0: WONTFIX, 2.1: DONE

[brixen (Brian Shirai)]

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?

[nobu (Nobuyoshi Nakada)]

• Description updated (diff)
• Category set to core
• Target version set to 2.2.0
• Backport changed from 2.0.0: UNKNOWN, 2.1: UNKNOWN to 2.0.0: REQUIRED, 2.1: REQUIRED

Elements expanded on the VM stack are overwritten by calling to_hash method.

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Closed
• % Done changed from 0 to 100

Applied in changeset r46775.

---

vm_insnhelper.c: fix implicit splat keyword argument

• vm_insnhelper.c (vm_callee_setup_keyword_arg): adjust VM stack
  pointer to get rid of overwriting splat arguments by arguments
  for to_hash conversion. [ruby-core:63593] [Bug #10016]

[nagachika (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.

[usa (Usaku NAKAMURA)]

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