[GHC] #7118: Comments of curly bracket form, which appear at the end of type deffinitions confuse GHC

[GHC]

#7118: Comments of curly bracket form, which appear at the end of type
deffinitions confuse GHC
--------------------------------+-------------------------------------------
 Reporter:  timthelion          |          Owner:                  
     Type:  bug                 |         Status:  new             
 Priority:  normal              |      Component:  Compiler        
  Version:  7.4.2               |       Keywords:                  
       Os:  Unknown/Multiple    |   Architecture:  Unknown/Multiple
  Failure:  Compile-time crash  |       Testcase:                  
Blockedby:                      |       Blocking:                  
  Related:                      |  
--------------------------------+-------------------------------------------
 {{{

 $ cat HaskarrowHelloWorld.broken.hs
 main :: IO (){-# LINE 8 "" #-}
 main = print "Hi"
 [timothy at timothy rewrite]$ ghc HaskarrowHelloWorld.broken.hs
 [1 of 1] Compiling Main             ( HaskarrowHelloWorld.broken.hs,
 HaskarrowHelloWorld.broken.o )
 ghc: panic! (the 'impossible' happened)
   (GHC version 7.4.2 for x86_64-unknown-linux):
         Prelude.head: empty list

 Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug

 [timothy at timothy rewrite]$
 $ ghc HaskarrowHelloWorld.working.hs
 [1 of 1] Compiling Main             ( HaskarrowHelloWorld.working.hs,
 HaskarrowHelloWorld.working.o )
 Linking HaskarrowHelloWorld.working ...
 [timothy at timothy rewrite]$ cat HaskarrowHelloWorld.working.hs
 main :: IO ()--{-# LINE 8 "" #-}
 main = print "Hi"
 [timothy at timothy rewrite]$ ./HaskarrowHelloWorld.working
 "Hi"

 }}}

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7118>
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