Threads window in experimental debugger show error call stack

[huguesv]

See what's being displayed for the location of main thread.

Not Flagged		1	0	Worker Thread	MainThread	[Traceback (most recent call last):
  File "C:\Program Files (x86)\Microsoft Visual Studio\Shared\Python36_64\lib\site-packages\ptvsd\ipcjson.py", line 319, in on_request
    target(request, args)
  File "C:\Program Files (x86)\Microsoft Visual Studio\Shared\Python36_64\lib\site-packages\ptvsd\wrapper.py", line 384, in f
    fut = m(self, self.loop, *args, **kwargs)
  File "C:\Program Files (x86)\Microsoft Visual Studio\Shared\Python36_64\lib\site-packages\ptvsd\futures.py", line 133, in g
    it = f(self, *args, **kwargs)
  File "C:\Program Files (x86)\Microsoft Visual Studio\Shared\Python36_64\lib\site-packages\ptvsd\wrapper.py", line 493, in on_stackTrace
    xframes = self.stack_traces[tid]
KeyError: 'pid_6920_id_2438299707656'
]

My code:

import multiprocessing
import threading

import sys
import time

def worker():
    time.sleep(5)
    print('worker')
    print('end')

def main():
    jobs = []
    for i in range(5):
        p = threading.Thread(target=worker)
        jobs.append(p)
        p.start()

    for j in jobs:
        j.join()


if __name__ == "__main__":
    sys.exit(int(main() or 0))