[GHC] #7985: Allow openFile on unknown file type

[GHC]

#7985: Allow openFile on unknown file type
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        Reporter:  singpolyma        |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Core Libraries    |              Version:  7.6.3
      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 singpolyma):

 * status:  closed => new
 * resolution:  invalid =>


Comment:

 I mean a filetype that is not one of the currently supported filetypes.
 The example in question when I opened this was some special kind of QNX
 file (like a device, but different) -- when patched to allow the handle to
 be created, operations on it work fine, but by default the program just
 crashes because it doesn't know how to categorise the file.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7985#comment:5>
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