Issue #10529 has been reported by Justin Coyne.

----------------------------------------
Backport #10529: r42709 IO.copy_stream should write in binary mode.
https://bugs.ruby-lang.org/issues/10529

* Author: Justin Coyne
* Status: Open
* Priority: Normal
* Assignee: 
----------------------------------------
Original issue: https://bugs.ruby-lang.org/issues/8767



-- 
https://bugs.ruby-lang.org/