[GHC] #11247: Weird error from running runghc on an invalid input filename

[GHC]

#11247: Weird error from running runghc on an invalid input filename
-------------------------------------+-------------------------------------
           Reporter:  rwbarton       |             Owner:
               Type:  bug            |            Status:  new
           Priority:  low            |         Milestone:
          Component:  Compiler       |           Version:  7.8.4
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:  #7765
Differential Rev(s):                 |         Wiki Page:
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 I had files `random.hs` and `random.hi` and `random.o`, so I accidentally
 entered the following command with tab completion.

 {{{
 rwbarton at morphism:/tmp$ runghc random.
 Warning: ignoring unrecognised input `random.'

 random.:1:33:
     Not in scope: ‘main’
     Perhaps you meant ‘min’ (imported from Prelude)
 }}}
 #7765 is surely related, but with HEAD (well, rather old, but at least new
 enough to contain the fix for #7765), the error is not really any better:
 {{{
 rwbarton at morphism:/tmp$ ~/ghc/inplace/bin/runghc random.
 Warning: ignoring unrecognised input `random.'

 random.:0:53: error:
     Variable not in scope: main :: IO a0
     Perhaps you meant ‘min’ (imported from Prelude)
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11247>
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