Issue #9440 has been reported by Shannon Skipper.

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Bug #9440: Calling methods on a `Queue.new.dup` or `Queue.new.clone` causes Segfault
https://bugs.ruby-lang.org/issues/9440

* Author: Shannon Skipper
* Status: Open
* Priority: Normal
* Assignee: 
* Category: lib
* Target version: 
* ruby -v: 2.1.0p0
* Backport: 2.1: UNKNOWN
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On all platforms with ruby-2.1.0 calling a Queue#method on a duped or cloned Queue results in a Segfault:

    queue = Queue.new.dup
    queue.empty? # Segfault

The same issue occurs when calling other Queue#methods.



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