[GHC] #13354: Package database locking patch broke ghc-pkg with non-existent database

[GHC]

#13354: Package database locking patch broke ghc-pkg with non-existent database
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        Reporter:  bgamari           |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  highest           |            Milestone:  8.2.1
       Component:  Package system    |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by bgamari):

 * cc: arybczak (added)


Comment:

 Off hand I'm sure what `ghc-pkg` did in this case previously. arybczak,
 would you be able to look into this?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13354#comment:1>
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