Issue #12974 has been updated by Tomoyuki Chikanaga.

Backport changed from 2.1: REQUIRED, 2.2: DONE, 2.3: REQUIRED to 2.1: REQUIRED, 2.2: DONE, 2.3: DONE

ruby_2_3 r57343 merged revision(s) 56894.

----------------------------------------
Bug #12974: Marshal.dump dumps core.
https://bugs.ruby-lang.org/issues/12974#change-62501

* Author: Shyouhei Urabe
* Status: Closed
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: ruby 2.4.0dev (2016-11-24 trunk 56892) [x86_64-darwin15]
* Backport: 2.1: REQUIRED, 2.2: DONE, 2.3: DONE
----------------------------------------
```ruby
Hash.include Module.new {
  def marshal_dump
    dup
  end

  def marshal_load this
    initialize_copy this
  end
}

p Marshal.load(Marshal.dump(foo:"bar"))
```

This script dumps core.



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