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brson/gist:8f8ebec710183f4378ec

Created January 6, 2015 06:57
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gistfile1.txt
* The `Copy` trait no longer implemented automatically and `Sync`
and `Share` aro no longer implemented automatically for types
containing unsafe pointers. `Sync` and `Share` are now 'unsafe
traits' for which implementations require an `unsafe impl`
declaration. These changes are intended to prevent some footguns
and are collectively known as [opt-in built-in traits][oibit]
(though `Sync` and `Share` will soon become pure library types
unknown to the compiler).
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