std::marker::Send - Rust
Description: API documentation for the Rust `Send` trait in crate `std`.
Keywords: rust, rustlang, rust-lang, Send

# 1.0.0[−][src]Trait std::marker::Send

    pub unsafe auto trait Send { }

Types that can be transferred across thread boundaries.

This trait is automatically implemented when the compiler determines it's appropriate.

An example of a non-`Send` type is the reference-counting pointer `rc::Rc`. If two threads attempt to clone `Rc`s that point to the same reference-counted value, they might try to update the reference count at the same time, which is undefined behavior because `Rc` doesn't use atomic operations. Its cousin `sync::Arc` does use atomic operations (incurring some overhead) and thus is `Send`.

See the Nomicon for more details.

## Implementations on Foreign Types

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`impl Send for Argument`

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`impl Send for FormatSpec`

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`impl Send for Alignment`

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`impl Send for Count`

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`impl Send for Position`

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`impl Send for __m256d`

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`impl Send for __m128i`

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`impl Send for __m256i`

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`impl Send for __m64`

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`impl Send for CpuidResult`

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`impl Send for __m128`

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`impl Send for __m256`

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`impl Send for __m128d`

## Implementors

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`impl !Send for Args`

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`impl !Send for ArgsOs`

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`impl !Send for Select`

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`impl !Send for LocalWaker`

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`impl Send for std::sync::Once`

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`impl Send for Waker`

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`impl<'a> Send for std::string::Drain<'a>`

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`impl<'a, T> Send for &'a T where T: Sync + ?Sized,`

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`impl<'a, T> Send for &'a mut T where T: Send + ?Sized,`

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`impl<'a, T> Send for std::collections::linked_list::Iter<'a, T> where T: Sync,`

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`impl<'a, T> Send for std::collections::linked_list::IterMut<'a, T> where T: Send,`

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`impl<'a, T> Send for std::collections::vec_deque::Drain<'a, T> where T: Send,`

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`impl<'a, T> Send for FutureObj<'a, T>`

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`impl<'a, T> Send for std::slice::Iter<'a, T> where T: Sync,`

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`impl<'a, T> Send for std::slice::IterMut<'a, T> where T: Send,`

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`impl<'a, T> Send for std::vec::Drain<'a, T> where T: Send,`

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`impl<'a, T: ?Sized> !Send for MutexGuard<'a, T>`

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`impl<'a, T: ?Sized> !Send for RwLockReadGuard<'a, T>`

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`impl<'a, T: ?Sized> !Send for RwLockWriteGuard<'a, T>`

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`impl<T> !Send for *const T where T: ?Sized,`

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`impl<T> !Send for *mut T where T: ?Sized,`

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`impl<T> !Send for NonNull<T> where T: ?Sized,`

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`NonNull` pointers are not `Send` because the data they reference may be aliased.

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`impl<T> !Send for Rc<T> where T: ?Sized,`

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`impl<T> !Send for std::rc::Weak<T> where T: ?Sized,`

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`impl<T> Send for Cell<T> where T: Send + ?Sized,`

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`impl<T> Send for RefCell<T> where T: Send + ?Sized,`

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`impl<T> Send for LinkedList<T> where T: Send,`

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`impl<T> Send for AtomicPtr<T>`

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`impl<T> Send for Arc<T> where T: Send + Sync + ?Sized,`

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`impl<T> Send for std::sync::Weak<T> where T: Send + Sync + ?Sized,`

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`impl<T> Send for JoinHandle<T>`

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`impl<T> Send for std::vec::IntoIter<T> where T: Send,`

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`impl<T: Send> Send for Receiver<T>`

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`impl<T: Send> Send for Sender<T>`

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`impl<T: Send> Send for SyncSender<T>`

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`impl<T: ?Sized + Send> Send for Mutex<T>`

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`impl<T: ?Sized + Send> Send for RwLock<T>`

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## Auto implementors

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`impl !Send for Excess`

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`impl !Send for Vars`

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`impl !Send for VarsOs`

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`impl !Send for TraitObject`

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`impl !Send for SpawnLocalObjError`

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`impl Send for std::cmp::Ordering`

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`impl Send for CollectionAllocErr`

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`impl Send for VarError`

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`impl Send for c_void`

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`impl Send for std::fmt::Alignment`

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`impl Send for ErrorKind`

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`impl Send for SeekFrom`

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`impl Send for IpAddr`

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`impl Send for Ipv6MulticastScope`

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`impl Send for Shutdown`

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`impl Send for std::net::SocketAddr`

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`impl Send for FpCategory`

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`impl Send for SearchStep`

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`impl Send for ParseError`

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`impl Send for std::sync::atomic::Ordering`

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`impl Send for RecvTimeoutError`

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`impl Send for TryRecvError`

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`impl Send for char`

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`impl Send for f32`

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`impl Send for f64`

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`impl Send for i128`

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`impl Send for i16`

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`impl Send for i32`

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`impl Send for i64`

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`impl Send for i8`

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`impl Send for isize`

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`impl Send for str`

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`impl Send for str`

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`impl Send for u128`

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`impl Send for u16`

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`impl Send for u32`

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`impl Send for u64`

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`impl Send for u8`

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`impl Send for usize`

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`impl Send for AllocErr`

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`impl Send for CannotReallocInPlace`

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`impl Send for Global`

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`impl Send for Layout`

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`impl Send for LayoutErr`

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`impl Send for System`

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`impl Send for TypeId`

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`impl Send for std::ascii::EscapeDefault`

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`impl Send for BorrowError`

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`impl Send for BorrowMutError`

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`impl Send for CharTryFromError`

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`impl Send for DecodeUtf16Error`

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`impl Send for EscapeDebug`

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`impl Send for std::char::EscapeDefault`

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`impl Send for EscapeUnicode`

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`impl Send for ParseCharError`

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`impl Send for ToLowercase`

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`impl Send for ToUppercase`

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`impl Send for UnicodeVersion`

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`impl Send for DefaultHasher`

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`impl Send for RandomState`

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`impl Send for JoinPathsError`

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`impl Send for CStr`

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`impl Send for CString`

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`impl Send for FromBytesWithNulError`

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`impl Send for IntoStringError`

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`impl Send for NulError`

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`impl Send for OsStr`

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`impl Send for OsString`

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`impl Send for std::fmt::Error`

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`impl Send for DirBuilder`

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`impl Send for DirEntry`

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`impl Send for File`

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`impl Send for FileType`

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`impl Send for Metadata`

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`impl Send for OpenOptions`

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`impl Send for Permissions`

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`impl Send for ReadDir`

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`impl Send for SipHasher`

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`impl Send for std::io::Empty`

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`impl Send for std::io::Error`

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`impl Send for Initializer`

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`impl Send for std::io::Repeat`

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`impl Send for Sink`

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`impl Send for Stderr`

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`impl Send for Stdin`

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`impl Send for Stdout`

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`impl Send for Pinned`

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`impl Send for AddrParseError`

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`impl Send for Ipv4Addr`

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`impl Send for Ipv6Addr`

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`impl Send for SocketAddrV4`

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`impl Send for SocketAddrV6`

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`impl Send for TcpListener`

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`impl Send for TcpStream`

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`impl Send for UdpSocket`

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`impl Send for NonZeroU128`

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`impl Send for NonZeroU16`

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`impl Send for NonZeroU32`

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`impl Send for NonZeroU64`

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`impl Send for NonZeroU8`

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`impl Send for NonZeroUsize`

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`impl Send for ParseFloatError`

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`impl Send for ParseIntError`

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`impl Send for TryFromIntError`

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`impl Send for RangeFull`

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`impl Send for NoneError`

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`impl Send for stat`

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`impl Send for std::os::unix::net::SocketAddr`

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`impl Send for UnixDatagram`

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`impl Send for UnixListener`

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`impl Send for UnixStream`

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`impl Send for Path`

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`impl Send for PathBuf`

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`impl Send for StripPrefixError`

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`impl Send for Child`

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`impl Send for ChildStderr`

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`impl Send for ChildStdin`

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`impl Send for ChildStdout`

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`impl Send for Command`

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`impl Send for ExitCode`

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`impl Send for ExitStatus`

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`impl Send for Output`

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`impl Send for Stdio`

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`impl Send for ParseBoolError`

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`impl Send for Utf8Error`

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`impl Send for FromUtf16Error`

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`impl Send for FromUtf8Error`

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`impl Send for String`

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`impl Send for AtomicBool`

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`impl Send for AtomicI16`

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`impl Send for AtomicI32`

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`impl Send for AtomicI64`

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`impl Send for AtomicI8`

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`impl Send for AtomicIsize`

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`impl Send for AtomicU16`

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`impl Send for AtomicU32`

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`impl Send for AtomicU64`

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`impl Send for AtomicU8`

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`impl Send for AtomicUsize`

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`impl Send for RecvError`

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`impl Send for Barrier`

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`impl Send for BarrierWaitResult`

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`impl Send for Condvar`

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`impl Send for OnceState`

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`impl Send for WaitTimeoutResult`

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`impl Send for SpawnErrorKind`

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`impl Send for SpawnObjError`

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`impl Send for AccessError`

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`impl Send for Builder`

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`impl Send for Thread`

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`impl Send for ThreadId`

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`impl Send for Duration`

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`impl Send for Instant`

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`impl Send for SystemTime`

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`impl Send for SystemTimeError`

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`impl<'a> !Send for Arguments<'a>`

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`impl<'a> !Send for Formatter<'a>`

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`impl<'a> !Send for StderrLock<'a>`

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`impl<'a> !Send for StdinLock<'a>`

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`impl<'a> !Send for StdoutLock<'a>`

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`impl<'a> !Send for PanicInfo<'a>`

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`impl<'a> !Send for Context<'a>`

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`impl<'a> Send for Component<'a>`

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`impl<'a> Send for Prefix<'a>`

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`impl<'a> Send for SplitPaths<'a>`

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`impl<'a> Send for std::net::Incoming<'a>`

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`impl<'a> Send for std::os::unix::net::Incoming<'a>`

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`impl<'a> Send for EncodeWide<'a>`

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`impl<'a> Send for Location<'a>`

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`impl<'a> Send for Ancestors<'a>`

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`impl<'a> Send for Components<'a>`

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`impl<'a> Send for Display<'a>`

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`impl<'a> Send for std::path::Iter<'a>`

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`impl<'a> Send for PrefixComponent<'a>`

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`impl<'a> Send for CharSearcher<'a>`

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`impl<'a> Send for std::str::Bytes<'a>`

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`impl<'a> Send for CharIndices<'a>`

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`impl<'a> Send for Chars<'a>`

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`impl<'a> Send for EncodeUtf16<'a>`

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`impl<'a> Send for std::str::Lines<'a>`

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`impl<'a> Send for LinesAny<'a>`

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`impl<'a> Send for SplitAsciiWhitespace<'a>`

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`impl<'a> Send for SplitWhitespace<'a>`

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`impl<'a, 'b> !Send for DebugList<'a, 'b>`

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`impl<'a, 'b> !Send for DebugMap<'a, 'b>`

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`impl<'a, 'b> !Send for DebugSet<'a, 'b>`

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`impl<'a, 'b> !Send for DebugStruct<'a, 'b>`

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`impl<'a, 'b> !Send for DebugTuple<'a, 'b>`

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`impl<'a, 'b> Send for CharSliceSearcher<'a, 'b>`

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`impl<'a, 'b> Send for StrSearcher<'a, 'b>`

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`impl<'a, A> Send for std::option::Iter<'a, A> where A: Sync,`

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`impl<'a, A> Send for std::option::IterMut<'a, A> where A: Send,`

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`impl<'a, B: ?Sized> Send for Cow<'a, B> where B: Sync, <B as ToOwned>::Owned: Send,`

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`impl<'a, F> Send for CharPredicateSearcher<'a, F> where F: Send,`

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`impl<'a, I> Send for Splice<'a, I> where I: Send, <I as Iterator>::Item: Send,`

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`impl<'a, K> Send for std::collections::hash_set::Drain<'a, K> where K: Send,`

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`impl<'a, K> Send for std::collections::hash_set::Iter<'a, K> where K: Sync,`

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`impl<'a, K, V> !Send for std::collections::hash_map::Entry<'a, K, V>`

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`impl<'a, K, V> !Send for std::collections::hash_map::OccupiedEntry<'a, K, V>`

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`impl<'a, K, V> !Send for std::collections::hash_map::VacantEntry<'a, K, V>`

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`impl<'a, K, V> Send for std::collections::btree_map::Entry<'a, K, V> where K: Send, V: Send,`

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`impl<'a, K, V> Send for std::collections::btree_map::Iter<'a, K, V> where K: Sync, V: Sync,`

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`impl<'a, K, V> Send for std::collections::btree_map::IterMut<'a, K, V> where K: Send, V: Send,`

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`impl<'a, K, V> Send for std::collections::btree_map::Keys<'a, K, V> where K: Sync, V: Sync,`

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`impl<'a, K, V> Send for std::collections::btree_map::OccupiedEntry<'a, K, V> where K: Send, V: Send,`

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`impl<'a, K, V> Send for std::collections::btree_map::Range<'a, K, V> where K: Sync, V: Sync,`

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`impl<'a, K, V> Send for RangeMut<'a, K, V> where K: Send, V: Send,`

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`impl<'a, K, V> Send for std::collections::btree_map::VacantEntry<'a, K, V> where K: Send, V: Send,`

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`impl<'a, K, V> Send for std::collections::btree_map::Values<'a, K, V> where K: Sync, V: Sync,`

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`impl<'a, K, V> Send for std::collections::btree_map::ValuesMut<'a, K, V> where K: Send, V: Send,`

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`impl<'a, K, V> Send for std::collections::hash_map::Drain<'a, K, V> where K: Send, V: Send,`

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`impl<'a, K, V> Send for std::collections::hash_map::Iter<'a, K, V> where K: Sync, V: Sync,`

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`impl<'a, K, V> Send for std::collections::hash_map::IterMut<'a, K, V> where K: Send, V: Send,`

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`impl<'a, K, V> Send for std::collections::hash_map::Keys<'a, K, V> where K: Sync, V: Sync,`

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`impl<'a, K, V> Send for std::collections::hash_map::Values<'a, K, V> where K: Sync, V: Sync,`

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`impl<'a, K, V> Send for std::collections::hash_map::ValuesMut<'a, K, V> where K: Send, V: Send,`

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`impl<'a, P> Send for MatchIndices<'a, P> where <P as Pattern<'a>>::Searcher: Send,`

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`impl<'a, P> Send for Matches<'a, P> where <P as Pattern<'a>>::Searcher: Send,`

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`impl<'a, P> Send for RMatchIndices<'a, P> where <P as Pattern<'a>>::Searcher: Send,`

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`impl<'a, P> Send for RMatches<'a, P> where <P as Pattern<'a>>::Searcher: Send,`

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`impl<'a, P> Send for std::str::RSplit<'a, P> where <P as Pattern<'a>>::Searcher: Send,`

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`impl<'a, P> Send for std::str::RSplitN<'a, P> where <P as Pattern<'a>>::Searcher: Send,`

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`impl<'a, P> Send for RSplitTerminator<'a, P> where <P as Pattern<'a>>::Searcher: Send,`

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`impl<'a, P> Send for std::str::Split<'a, P> where <P as Pattern<'a>>::Searcher: Send,`

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`impl<'a, P> Send for std::str::SplitN<'a, P> where <P as Pattern<'a>>::Searcher: Send,`

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`impl<'a, P> Send for SplitTerminator<'a, P> where <P as Pattern<'a>>::Searcher: Send,`

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`impl<'a, T> !Send for LocalFutureObj<'a, T>`

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`impl<'a, T> !Send for std::sync::mpsc::Iter<'a, T>`

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`impl<'a, T> !Send for TryIter<'a, T>`

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`impl<'a, T> Send for std::collections::binary_heap::Drain<'a, T> where T: Send,`

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`impl<'a, T> Send for std::collections::binary_heap::Iter<'a, T> where T: Sync,`

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`impl<'a, T> Send for PeekMut<'a, T> where T: Send,`

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`impl<'a, T> Send for std::collections::btree_set::Difference<'a, T> where T: Sync,`

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`impl<'a, T> Send for std::collections::btree_set::Intersection<'a, T> where T: Sync,`

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`impl<'a, T> Send for std::collections::btree_set::Iter<'a, T> where T: Sync,`

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`impl<'a, T> Send for std::collections::btree_set::Range<'a, T> where T: Sync,`

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`impl<'a, T> Send for std::collections::btree_set::SymmetricDifference<'a, T> where T: Sync,`

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`impl<'a, T> Send for std::collections::btree_set::Union<'a, T> where T: Sync,`

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`impl<'a, T> Send for std::collections::vec_deque::Iter<'a, T> where T: Sync,`

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`impl<'a, T> Send for std::collections::vec_deque::IterMut<'a, T> where T: Send,`

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`impl<'a, T> Send for std::result::Iter<'a, T> where T: Sync,`

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`impl<'a, T> Send for std::result::IterMut<'a, T> where T: Send,`

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`impl<'a, T> Send for Chunks<'a, T> where T: Sync,`

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`impl<'a, T> Send for ChunksMut<'a, T> where T: Send,`

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`impl<'a, T> Send for ExactChunks<'a, T> where T: Sync,`

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`impl<'a, T> Send for ExactChunksMut<'a, T> where T: Send,`

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`impl<'a, T> Send for Windows<'a, T> where T: Sync,`

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`impl<'a, T, F> !Send for std::collections::linked_list::DrainFilter<'a, T, F>`

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`impl<'a, T, F> Send for std::vec::DrainFilter<'a, T, F> where F: Send, T: Send,`

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`impl<'a, T, P> Send for std::slice::RSplit<'a, T, P> where P: Send, T: Sync,`

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`impl<'a, T, P> Send for RSplitMut<'a, T, P> where P: Send, T: Send,`

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`impl<'a, T, P> Send for std::slice::RSplitN<'a, T, P> where P: Send, T: Sync,`

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`impl<'a, T, P> Send for RSplitNMut<'a, T, P> where P: Send, T: Send,`

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`impl<'a, T, P> Send for std::slice::Split<'a, T, P> where P: Send, T: Sync,`

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`impl<'a, T, P> Send for SplitMut<'a, T, P> where P: Send, T: Send,`

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`impl<'a, T, P> Send for std::slice::SplitN<'a, T, P> where P: Send, T: Sync,`

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`impl<'a, T, P> Send for SplitNMut<'a, T, P> where P: Send, T: Send,`

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`impl<'a, T, S> Send for std::collections::hash_set::Difference<'a, T, S> where S: Sync, T: Sync,`

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`impl<'a, T, S> Send for std::collections::hash_set::Intersection<'a, T, S> where S: Sync, T: Sync,`

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`impl<'a, T, S> Send for std::collections::hash_set::SymmetricDifference<'a, T, S> where S: Sync, T: Sync,`

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`impl<'a, T, S> Send for std::collections::hash_set::Union<'a, T, S> where S: Sync, T: Sync,`

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`impl<'a, T: ?Sized> Send for PinMut<'a, T> where T: Send,`

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`impl<'b, T> !Send for Ref<'b, T>`

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`impl<'b, T> !Send for RefMut<'b, T>`

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`impl<'rx, T> !Send for Handle<'rx, T>`

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`impl<A> Send for std::iter::Repeat<A> where A: Send,`

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`impl<A> Send for std::option::IntoIter<A> where A: Send,`

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`impl<A, B> Send for std::iter::Chain<A, B> where A: Send, B: Send,`

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`impl<A, B> Send for Zip<A, B> where A: Send, B: Send,`

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`impl<B> Send for std::io::Lines<B> where B: Send,`

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`impl<B> Send for std::io::Split<B> where B: Send,`

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`impl<F> Send for RepeatWith<F> where F: Send,`

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`impl<H> Send for BuildHasherDefault<H> where H: Send,`

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`impl<I> Send for DecodeUtf16<I> where I: Send,`

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`impl<I> Send for Cloned<I> where I: Send,`

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`impl<I> Send for Cycle<I> where I: Send,`

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`impl<I> Send for Enumerate<I> where I: Send,`

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`impl<I> Send for Flatten<I> where I: Send, <<I as Iterator>::Item as IntoIterator>::IntoIter: Send,`

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`impl<I> Send for Fuse<I> where I: Send,`

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`impl<I> Send for Peekable<I> where I: Send, <I as Iterator>::Item: Send,`

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`impl<I> Send for Skip<I> where I: Send,`

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`impl<I> Send for StepBy<I> where I: Send,`

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`impl<I> Send for std::iter::Take<I> where I: Send,`

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`impl<I, F> Send for FilterMap<I, F> where F: Send, I: Send,`

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`impl<I, F> Send for Inspect<I, F> where F: Send, I: Send,`

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`impl<I, F> Send for Map<I, F> where F: Send, I: Send,`

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`impl<I, P> Send for Filter<I, P> where I: Send, P: Send,`

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`impl<I, P> Send for SkipWhile<I, P> where I: Send, P: Send,`

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`impl<I, P> Send for TakeWhile<I, P> where I: Send, P: Send,`

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`impl<I, St, F> Send for Scan<I, St, F> where F: Send, I: Send, St: Send,`

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`impl<I, U, F> Send for FlatMap<I, U, F> where F: Send, I: Send, <U as IntoIterator>::IntoIter: Send,`

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`impl<Idx> Send for std::ops::Range<Idx> where Idx: Send,`

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`impl<Idx> Send for RangeFrom<Idx> where Idx: Send,`

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`impl<Idx> Send for RangeInclusive<Idx> where Idx: Send,`

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`impl<Idx> Send for RangeTo<Idx> where Idx: Send,`

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`impl<Idx> Send for RangeToInclusive<Idx> where Idx: Send,`

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`impl<K> Send for std::collections::hash_set::IntoIter<K> where K: Send,`

###

`impl<K, V> Send for BTreeMap<K, V> where K: Send, V: Send,`

###

`impl<K, V> Send for std::collections::btree_map::IntoIter<K, V> where K: Send, V: Send,`

###

`impl<K, V> Send for std::collections::hash_map::IntoIter<K, V> where K: Send, V: Send,`

###

`impl<K, V, S> Send for HashMap<K, V, S> where K: Send, S: Send, V: Send,`

###

`impl<R> Send for BufReader<R> where R: Send,`

###

`impl<R> Send for std::io::Bytes<R> where R: Send,`

###

`impl<T> Send for Bound<T> where T: Send,`

###

`impl<T> Send for Option<T> where T: Send,`

###

`impl<T> Send for TryLockError<T> where T: Send,`

###

`impl<T> Send for TrySendError<T> where T: Send,`

###

`impl<T> Send for Poll<T> where T: Send,`

###

`impl<T> Send for Reverse<T> where T: Send,`

###

`impl<T> Send for BinaryHeap<T> where T: Send,`

###

`impl<T> Send for std::collections::binary_heap::IntoIter<T> where T: Send,`

###

`impl<T> Send for BTreeSet<T> where T: Send,`

###

`impl<T> Send for std::collections::btree_set::IntoIter<T> where T: Send,`

###

`impl<T> Send for std::collections::linked_list::IntoIter<T> where T: Send,`

###

`impl<T> Send for std::collections::vec_deque::IntoIter<T> where T: Send,`

###

`impl<T> Send for VecDeque<T> where T: Send,`

###

`impl<T> Send for Cursor<T> where T: Send,`

###

`impl<T> Send for std::io::Take<T> where T: Send,`

###

`impl<T> Send for std::iter::Empty<T> where T: Send,`

###

`impl<T> Send for std::iter::Once<T> where T: Send,`

###

`impl<T> Send for Rev<T> where T: Send,`

###

`impl<T> Send for Discriminant<T>`

###

`impl<T> Send for Wrapping<T> where T: Send,`

###

`impl<T> Send for AssertUnwindSafe<T> where T: Send,`

###

`impl<T> Send for std::result::IntoIter<T> where T: Send,`

###

`impl<T> Send for std::sync::mpsc::IntoIter<T> where T: Send,`

###

`impl<T> Send for SendError<T> where T: Send,`

###

`impl<T> Send for PoisonError<T> where T: Send,`

###

`impl<T> Send for LocalKey<T>`

###

`impl<T> Send for Vec<T> where T: Send,`

###

`impl<T, E> Send for Result<T, E> where E: Send, T: Send,`

###

`impl<T, S> Send for HashSet<T, S> where S: Send, T: Send,`

###

`impl<T, U> Send for std::io::Chain<T, U> where T: Send, U: Send,`

###

`impl<T: ?Sized> Send for Box<T> where T: Send,`

###

`impl<T: ?Sized> Send for UnsafeCell<T> where T: Send,`

###

`impl<T: ?Sized> Send for PhantomData<T> where T: Send,`

###

`impl<T: ?Sized> Send for ManuallyDrop<T> where T: Send,`

###

`impl<T: ?Sized> Send for PinBox<T> where T: Send,`

###

`impl<W> Send for BufWriter<W> where W: Send,`

###

`impl<W> Send for IntoInnerError<W> where W: Send,`

###

`impl<W> Send for LineWriter<W> where W: Send,`

###

`impl<Y, R> Send for GeneratorState<Y, R> where R: Send, Y: Send,`

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