Bug #10994: Inconsistent behavior when mixing optional argument and keyword splat

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: ruby 2.2.1p85 (2015-02-26 revision 49769) [x86_64-darwin13]
• Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN

[ruipserra (Rui Serra)]

The following code produces inconsistent behavior:

def foo(x=nil, **kw) 
  x 
end

h = { "a" => 1 }

foo(h)                  # => {"a"=>1} 
foo(h).equal?(h)        # => false
foo(h, y: 1).equal?(h)  # => true

It seems that in this very specific case, foo is returning a copy of h instead of returning h itself. I guess this is an edge case in the keyword extraction process.

Thank you for your time.

[jeremyevans0 (Jeremy Evans)]

• Related to Feature #14183: "Real" keyword argument added

[jeremyevans0 (Jeremy Evans)]

• Status changed from Open to Closed

With the acceptance of #14183, you now get:

foo(h) 
# => {"a"=>1}

foo(h).equal?(h)
# => true

foo(h, y: 1).equal?(h) 
# => true