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

[GHC]

#7985: Allow openFile on unknown file type
-------------------------------------+-------------------------------------
              Reporter:  singpolyma  |            Owner:  ekmett
                  Type:  bug         |           Status:  infoneeded
              Priority:  normal      |        Milestone:
             Component:  Core        |          Version:  7.6.3
  Libraries                          |         Keywords:
            Resolution:              |     Architecture:  Unknown/Multiple
      Operating System:              |       Difficulty:  Unknown
  Unknown/Multiple                   |       Blocked By:
       Type of failure:              |  Related Tickets:
  None/Unknown                       |
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
-------------------------------------+-------------------------------------
Changes (by thomie):

 * cc: core-libraries-committee@… (added)
 * difficulty:   => Unknown
 * status:  new => infoneeded


Comment:

 singpolyma: could you please give an example that currently fails, and
 which you would like to succeed. I'm not sure what you mean by 'special
 file type'. Thanks.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7985#comment:2>
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