IpcBytesSender::send will hang up when receiver is not work.

[jmjoy]

OS: Linux（5.4.50）

Test code:

use ipc_channel::ipc::bytes_channel;

fn main() {
    let (sender, _receiver) = bytes_channel().unwrap();

    for i in  0..1000 {
        println!("count: {}", i);
        sender.send(b"...").unwrap();
    }
}

Result (Hang up when count is 278):

...
count: 275
count: 276
count: 277
count: 278

If it really will hang up, may be prompt on the document?

[jdm]

It would be useful to step through this code to find out where the hang is coming from.