Issue #10679 has been reported by Jon Forums.

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Backport #10679: Backport 48997 to ruby_2_1
https://bugs.ruby-lang.org/issues/10679

* Author: Jon Forums
* Status: Open
* Priority: Normal
* Assignee: 
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This fix has been backported to `ruby_2_2` and is also needed on `ruby_2_1` to allow building with mingw-w64 gcc 4.9.2.

Please backport at your earliest convenience. Thank you.



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