[tor-bugs] #5089 [- Select a component]: get_parent_directory returns error for /home

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#5089: get_parent_directory returns error for /home
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 Reporter:  emanchado             |          Owner:     
     Type:  defect                |         Status:  new
 Priority:  minor                 |      Milestone:     
Component:  - Select a component  |        Version:     
 Keywords:  unittest              |         Parent:     
   Points:                        |   Actualpoints:     
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 get_parent_directory fails with a path like /home.

 Expected behaviour: it returns normally with the result "/".

 Actual behaviour: it returns an error (-1).

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/5089>
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