Glacier2/router browser failures

[pepone]

I see this failure with Glacier2/router in Chrome browser:

creating session with correct password... ok
trying to create a second session... 

    at OutgoingAsync.markFinishedEx (AsyncResult.js:93:1)
    at OutgoingAsync.markFinishedEx (OutgoingAsync.js:182:1)
    at OutgoingAsync.completedEx (OutgoingAsync.js:78:1)
    at OutgoingAsync.completed (OutgoingAsync.js:444:1)
    at ConnectionI.dispatch (ConnectionI.js:899:1)
    at ConnectionI.message (ConnectionI.js:872:1)
    at WSTransceiver._bytesAvailableCallback (ConnectionI.js:154:1)
    at WSTransceiver.socketBytesAvailable (WSTransceiver.js:343:1)
    at _fd.onmessage (WSTransceiver.js:83:1)
Debug.js:50 Uncaught Error
    at Exception.captureStackTrace (Exception.js:105:1)
    at new AssertionFailedException (Debug.js:36:1)
    at Debug.assert (Debug.js:50:1)
    at OutgoingAsync.markFinishedEx (AsyncResult.js:93:1)
    at OutgoingAsync.markFinishedEx (OutgoingAsync.js:182:1)
    at OutgoingAsync.completedEx (OutgoingAsync.js:78:1)
    at OutgoingAsync.completed (OutgoingAsync.js:444:1)
    at ConnectionI.dispatch (ConnectionI.js:899:1)
    at ConnectionI.message (ConnectionI.js:872:1)
    at WSTransceiver._bytesAvailableCallback (ConnectionI.js:154:1)
```

[pepone]

Cannot reproduce