huonw · August 29, 2015 14:12
diff --git a/gistfile1.txt b/gistfile1.txt
    * The `Copy` trait is no longer implemented automatically. Unsafe pointers no longer implement `Sync`
      and `Send` so types containing them don't automatically either. `Sync` and `Send` are now 'unsafe
      traits' so one can "forcibly" implement them via `unsafe impl` if a type confirms to the requirements for them even though the internals do not (e.g. structs containing unsafe pointers like `Arc`). 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).
	* The `Copy` trait is no longer implemented automatically. Unsafe pointers no longer implement `Sync`
	and `Send` so types containing them don't automatically either. `Sync` and `Send` are now 'unsafe
	traits' so one can "forcibly" implement them via `unsafe impl` if a type confirms to the requirements for them even though the internals do not (e.g. structs containing unsafe pointers like `Arc`). 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).