eventTask Error with rx Observable

[aliatsis]

I ran into a critical bug when using the inquirer package when zone.js is imported.
After reading a bunch of source code, I assembled the following code snippet to reproduce the underlying issue with rx Observables and zone.

var createInterface = require('readline').createInterface;
var Observable = require('rx').Observable;
require('zone.js');

var rl = createInterface({ terminal: true, input: process.stdin, output: process.stdout });
var keypress = Observable.fromEvent(rl.input, 'keypress');
var line = Observable.fromEvent(rl, 'line');
keypress.takeUntil(line).toPromise();

When running the above code as a node script and pressing the 'enter' key as input, the following error occurs:

Error: eventTask 'ReadStream.addListener:keypress': can not transition to 'running', expecting state 'scheduled', was 'notScheduled'.
 at ZoneTask._transitionTo (/Users/anthonyliatsis/projects/creditiq/ciq-cli/node_modules/zone.js/dist/zone-node.js:511:23)
 at Zone.runTask (/Users/anthonyliatsis/projects/creditiq/ciq-cli/node_modules/zone.js/dist/zone-node.js:171:34)
 at ReadStream.ZoneTask.invoke (/Users/anthonyliatsis/projects/creditiq/ciq-cli/node_modules/zone.js/dist/zone-node.js:476:38)
 at emitTwo (events.js:92:20)
 at ReadStream.emit (events.js:172:7)
 at emitKeys (readline.js:1251:14)
 at next (native)
 at ReadStream.onData (readline.js:919:36)
 at ZoneDelegate.invokeTask (/Users/anthonyliatsis/projects/creditiq/ciq-cli/node_modules/zone.js/dist/zone-node.js:414:31)
 at Zone.runTask (/Users/anthonyliatsis/projects/creditiq/ciq-cli/node_modules/zone.js/dist/zone-node.js:181:47)

A proper fix is obviously ideal, but please let me know if there is any quick code fix I can do before the real fix is merged.

[JiaLiPassion]

@aliatsis, thank you for posting the issue ,I can reproduce and I will do more research that how to fix this one, can you remove keypress Observable like this ?

var createInterface = require('readline').createInterface;
var Observable = require('rx').Observable;
require('zone.js');
Error.stackTraceLimit = 50;

var rl = createInterface({ terminal: true, input: process.stdin, output: process.stdout });
//var keypress = Observable.fromEvent(rl.input, 'keypress');
var line = Observable.fromEvent(rl, 'line');
line.subscribe(r => {
...
});

[aliatsis]

@JiaLiPassion thanks!
unfortunately, I don't control the code causing the issue for me (it's in the inquirer package which I am using.
I guess I can fork it or try to override some of their internal methods for the time being.

looking forward to the real fix! thanks!