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wadie/warning.exs

Created August 3, 2018 11:59
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Remove warning
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warning.exs
iex(2)> original_stderr = Process.whereis(:standard_error)
#PID<0.59.0>
iex(3)> Process.unregister(:standard_error)
true
iex(4)> {:ok, dev} = StringIO.open("")
{:ok, #PID<0.184.0>}
iex(5)> Process.register(dev, :standard_error)
true
iex(6)> IO.puts :stderr, "Oops!"
:ok
iex(7)> captured = StringIO.flush(dev)
"Oops!\n"
iex(8)> IO.write(original_stderr, captured)
Oops!
:ok
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