[tor-bugs] #15510 [Tor Browser]: The controller for the circuit-display is not stopped on New Identity

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#15510: The controller for the circuit-display is not stopped on New Identity
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     Reporter:  gk       |      Owner:  tbb-team
         Type:  defect   |     Status:  needs_review
     Priority:  normal   |  Milestone:
    Component:  Tor      |    Version:
  Browser                |   Keywords:  tbb-circuit-display,
   Resolution:           |  TorBrowserTeam201503R
Actual Points:           |  Parent ID:
       Points:           |
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Comment (by arthuredelstein):

 That fix isn't in the right place -- `bindPrefAndInit`is supposed to be a
 generic utililty function that binds to any pref we choose and calls
 prefHandler(currentPrefValue) whenever the pref changes. It is not
 specific to the controller and it's not designed only for boolean prefs.

 My intention was that the controller code is set up to create only one
 instance of the controller, the first time controller(...) is called, and
 just return an extra pointer to the controller with each subsequent call.
 Please see the comment and code at
 https://gitweb.torproject.org/torbutton.git/tree/src/modules/tor-control-
 port.js#n648
 But it's possible I got this code wrong or the code in tor-circuit-display
 wrong. What was the original symptom you saw?

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/15510#comment:2>
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