[ruby-core:86165] [Ruby trunk Bug#14611] Exotic method parameters bug

Issue #14611 has been updated by phluid61 (Matthew Kerwin).


Hanmac (Hans Mackowiak) wrote:
> @phluid61 not so fast, ruby allows duplicate "_" as parameters so you can say that you don't want them and ruby should just ignore them
> so you don't get a SyntaxError about duplicated argument name like your change did
> 
> That has nothing to do with rubocop

... really? When did that happen? I had a look in syntax.rdoc and other places but didn't see any mention of it. 

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Bug #14611: Exotic method parameters bug
https://bugs.ruby-lang.org/issues/14611#change-71048

* Author: bogdan (Bogdan Gusiev)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: 2.4.2
* Backport: 2.3: UNKNOWN, 2.4: UNKNOWN, 2.5: UNKNOWN
----------------------------------------
Consider the following code:


~~~ ruby
def test(_, x, *_)
  x
end

test(1,2,3) # => nil
~~~

By some reason second parameter is nil when the rest of parameters declared as not used.




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