Readline hanging after first input in terminal

[basickarl]

Tested on 8.1.0 and 9.0.0
Mac Sierra 10.12.6
Darwin 16.7.0 Darwin Kernel Version 16.7.0: Thu Jun 15 17:36:27 PDT 2017; root:xnu-3789.70.16~2/RELEASE_X86_64 x86_64

Was reading the documentation on readline: https://nodejs.org/docs/latest-v8.x/api/readline.html

States the the close method and it states:

The readline.Interface instance should be considered to be "finished"
once the 'close' event is emitted.

So naturally I would open a new interface, like I've done in the following example:

const readline = require('readline');

function question(question, defaultAnswer) {
    // Create the interface
    const rl = readline.createInterface({
        input: process.stdin,
        output: process.stdout,
    });
    return new Promise((resolve, reject) => {
        rl.question(question, (answer) => {
            // Relinquished control over the input and output streams
            rl.close();
            if (answer.length === 0) {
                resolve(defaultAnswer);
            } else {
                resolve(answer);
            }
        });
    });
}

(async () => {
    let answer;
    answer = await question('1? [y] ', 'y');
    console.log('answer', answer);
    answer = await question('2? [y] ', 'y');
    console.log('answer', answer);
    answer = await question('3? [y] ', 'y');
    console.log('answer', answer);
})();

Output:

$ node test.js
1? [y] y
answer y
2? [y]

It hangs however. I cannot input text not can I CTRL-C. I do not know if this is a Mac bug or a Node bug. This seems to be working on other Mac versions.

[uttampawar]

@basickarl This seems to be working on Debian system with LTS 8.5.0 and master node build (v10.0.0-pre).

[cjihrig]

This is a known issue in 8.1.0 that is fixed in 8.1.1. I'm unable to reproduce this on Mac Sierra 10.12.6 on 9.0.0 or master.

[basickarl]

@cjihrig I restarted my Mac and now it seems to work with any version except 8.1.0, hmm. Thank you! Closing.

[rgranger]

👍

I am having a similar issue here :
The process hangs like if there still was listeners on the event loop

#!/usr/bin/env node

const readline = require('readline')

const rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout
})

console.log('enter something')

rl.on('line', (line) => {
  console.log('line', line)
  rl.close()
})

rl.on('close', () => {
  console.log('closed')
})

Using the script with node works fine :
The process exits after the first message

node my-script.js
// exits

But using it with the shebang "#!/usr/bin/env node" does not :
The process logs 'closed", but never exits.

./my-script.js
// hangs

Versions

OS : windows 7
node : 8.9.4

(ps : it works fine on windows 10.)