EIO when process ends

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Description

$ node --version
v8.5.0
$ cat package.json | grep node-pty
"node-pty": "^0.7.4",
$ node -e "
const node_pty = require('node-pty');
const pty = node_pty.spawn('bash');
pty.on('error', error => console.error(error));
pty.write('exit\r\n');
"
{ Error: read EIO
    at _errnoException (util.js:1026:11)
    at Pipe.onread (net.js:606:25) code: 'EIO', errno: 'EIO', syscall: 'read' }

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