[tbb-bugs] #20185 [Applications/Tor Browser]: Tor Browser alpha is broken on Linux (and probably OS X) if directory is nested too deep

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#20185: Tor Browser alpha is broken on Linux (and probably OS X) if directory is
nested too deep
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 Reporter:  gk                        |          Owner:  tbb-team
     Type:  defect                    |         Status:  needs_revision
 Priority:  High                      |      Milestone:
Component:  Applications/Tor Browser  |        Version:
 Severity:  Major                     |     Resolution:
 Keywords:  TorBrowserTeam201610      |  Actual Points:
Parent ID:  #14270                    |         Points:
 Reviewer:                            |        Sponsor:
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Comment (by gk):

 Replying to [comment:12 mcs]:
 > Replying to [comment:9 gk]:
 > > I think I don't understand why `_createUniquIPCDir()` would return
 `null` if the destination would be too long (at least after reading the
 .idl file I am still wondering). Could you elaborate?
 >
 > Our patch does not rely on `_createUniquIPCDir()` to do any length
 checking; that is done by `_isIPCPathLengthOK()`. Are you concerned about
 the fact that we do not check the path length in the `/tmp/Tor` case?  Our
 assumption is that such a path will not be too long (and we have no
 additional options).

 I am just confused about the comment above this function because I somehow
 fail to see how `null` gets returned if the destination would be too long.

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Ticket URL: <https://troodi.torproject.org/projects/tor/ticket/20185#comment:14>
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