I thought the whole purpose of a channel was to share data between threads. I have this code, [based on this example](http://rustbyexample.com/std_misc/channels.html):

```
let tx_thread = tx.clone();
let ctx = self;
thread::spawn(|| {
    ...
    let result = ctx.method()
    tx_thread.send((String::from(result), someOtherString)).unwrap();
})

```

Where `tx` is a `mpsc::Sender<(String, String)>`

```none
error[E0277]: the trait bound `std::sync::mpsc::Sender<(std::string::String, std::string::String)>: std::marker::Sync` is not satisfied
   --> src/my_module/my_file.rs:137:9
    |
137 |         thread::spawn(|| {
    |         ^^^^^^^^^^^^^
    |
    = note: `std::sync::mpsc::Sender<(std::string::String, std::string::String)>` cannot be shared between threads safely
    = note: required because of the requirements on the impl of `std::marker::Send` for `&std::sync::mpsc::Sender<(std::string::String, std::string::String)>`
    = note: required because it appears within the type `[closure@src/my_module/my_file.rs:137:23: 153:10 res:&&str, ctx:&&my_module::my_submodule::Reader, tx_thread:&std::sync::mpsc::Sender<(std::string::String, std::string::String)>]`
    = note: required by `std::thread::spawn`

```

I'm confused where I went wrong. Unless I'm looking in the wrong place and my issue is actually my use of `let ctx = self;`?