[GHC] #14894: HEAD fails to build with -g1

[GHC]

#14894: HEAD fails to build with -g1
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        Reporter:  niteria           |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.5
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:  x86_64
 Type of failure:  Debugging         |  (amd64)
  information is incorrect           |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by bgamari):

 Oh dear; we should add a test to ensure that at least "hello world" is
 compiled with `-g` when the testsuite is run.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14894#comment:4>
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