imitate leak

This imitate code seem to leak, doesn’t it?

import xs from 'xstream'
import delay from 'xstream/extra/delay'

let proxy$ = new xs.createMimic()

let source$ = proxy$.startWith(1).map(x => x*2)
  .debug(x => console.log('source$ tap', x))  

let result$ = source$.compose(delay(1000))

proxy$.imitate(result$)

result$
  .take(4)
  .addListener({
    next: x => console.log('x', x),
    error: () => {},
    complete: () => {}
  })

source$ tap 2
x 2
source$ tap 4
x 4
source$ tap 8
x 8
source$ tap 16
x 16
source$ tap 32 // here a leak starts
source$ tap 64
source$ tap 128
....

http://www.webpackbin.com/E17QfBUVb

I was pretty sure that imitate should protect from such leak that was (actually is) a problem with rx proxy subjects.

[staltz]

I think I just need to build a cycle detection system to cleanup those cycles. Seems unavoidable.

[wclr]

@staltz it leaks in 5.0.3 http://www.webpackbin.com/NyZXA0v4b (see the console) change the leak test as I pointed in the comment above