Fix build with 'nightly' feature
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@ -5,6 +5,8 @@
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//! break.
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//! break.
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#![warn(missing_docs)]
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#![warn(missing_docs)]
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#![cfg_attr(feature = "nightly", feature(io))]
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#[cfg(not(target_os = "redox"))]
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#[cfg(not(target_os = "redox"))]
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extern crate libc;
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extern crate libc;
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