Issue #14279 has been updated by naruse (Yui NARUSE).

Backport changed from 2.3: REQUIRED, 2.4: REQUIRED, 2.5: REQUIRED to 2.3: REQUIRED, 2.4: REQUIRED, 2.5: DONE

ruby_2_5 r62420 merged revision(s) 61603.

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Bug #14279: Modifying splat argument causes segmentation fault
https://bugs.ruby-lang.org/issues/14279#change-70388

* Author: coreycerovsek (Corey Cerovsek)
* Status: Closed
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: ruby 2.5.0rc1 (2017-12-14 trunk 61243) [x86_64-linux]
* Backport: 2.3: REQUIRED, 2.4: REQUIRED, 2.5: DONE
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Using Docker Ruby images ruby:2.2 through ruby:rc as of 2018-01-03, this little bit of code causes a segmentation fault:

~~~
class A 
  def x(*args)
    args = 13
    super
  end
end
A.new.x
~~~

I'm not sure what the behavior of super ought to be here, and it doesn't seem to be addressed by The Ruby Spec Suite, but with Ruby 2.1 (Docker ruby:2.1) this causes a "no superclass method" exception rather than crashing the interpreter. I'm guessing this has to do with the optimization in https://bugs.ruby-lang.org/issues/10440



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