Container method fails if no ports exposed (0.91 and 0.92)

[ark3]

because the network container crashes:

   9.7  25 | [INFO  tini (1)] Spawned child process 'python3' with pid '8'
   9.9  25 |    0.0 TEL | Telepresence 0+unknown launched at Wed Aug 22 21:04:45 2018
   9.9  25 |    0.0 TEL |   /usr/bin/entrypoint.py proxy '{"port": 58856, "cidrs": ["10.3.240.0/20", "10.0.17.0/24", "10.0.1.0/24", "10.0.0.0/24", "10.0.2.0/24"], "expose_ports": [], "ip": "198.18.0.254"}'
   9.9  25 |    0.0 TEL | Platform: linux
   9.9  25 |    0.0 TEL | Python 3.6.1 (default, Oct  2 2017, 20:46:59)
   9.9  25 |    0.0 TEL | [GCC 6.3.0]
   9.9  25 |    0.0 TEL | [1] Running: uname -a
   9.9  25 |    0.0   1 | Linux 868d9a9b63da 4.9.93-linuxkit-aufs #1 SMP Wed Jun 6 16:55:56 UTC 2018 x86_64 Linux
   9.9  25 |    0.0 TEL | Everything launched. Waiting to exit...
   9.9  25 |    0.0 TEL | BEGIN SPAN __init__.py:497(wait_for_exit)
  10.0  25 | Traceback (most recent call last):
  10.0  25 |   File "/usr/bin/entrypoint.py", line 121, in <module>
  10.0  25 |     main()
  10.0  25 |   File "/usr/bin/entrypoint.py", line 65, in main
  10.0  25 |     proxy(loads(sys.argv[2]))
  10.0  25 |   File "/usr/bin/entrypoint.py", line 104, in proxy
  10.0  25 |     wait_for_exit(runner, main_process)
  10.0  25 |   File "/usr/lib/python3.6/site-packages/telepresence/runner/__init__.py", line 512, in wait_for_exit
  10.0  25 |     dead_bg = runner.tracked.which_dead()
  10.0  25 | AttributeError: 'NoneType' object has no attribute 'which_dead'
  10.0  25 | [INFO  tini (1)] Main child exited normally (with status '1')

Using --expose causes an additional ssh to be launched, avoiding this issue. This is why the usual tests didn't catch this.

Work around this bug by adding an unused --expose 60000 or whatever to your command.

[ark3]

I hack-patched this on Docker Hub. If you're seeing this crash, try this to fix your local Docker:

docker pull datawire/telepresence-local:0.92