[GHC] #8334: unexpected type inference failure in main

[GHC]

#8334: unexpected type inference failure in main
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        Reporter:  carter            |            Owner:
            Type:  bug               |           Status:  closed
        Priority:  normal            |        Milestone:
       Component:  Compiler          |          Version:  7.7
      Resolution:  invalid           |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
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Changes (by simonpj):

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


Comment:

 `main` only has special behaviour when it's in module `Main`. When it's in
 some other module, like `PrefetchTest` in this case, there is no implied
 signature `main :: IO ()`.

 But if you tell GHC "the main module is `PrefetchTest`" then it all works
 again:
 {{{
 ghc -c -main-is PrefetchTest PrefetchTest.hs
 }}}
 So it all looks fine to me.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8334#comment:2>
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