[GHC] #10895: "no output will be generated" should be an error, not a warning.

[GHC]

#10895: "no output will be generated" should  be an error, not a warning.
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        Reporter:  gershomb          |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  Compiler          |                 Version:  7.10.2
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  Incorrect         |  Unknown/Multiple
  warning at compile-time            |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
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Comment (by gershomb):

 Yep, ticket amended to indicate.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10895#comment:3>
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