[GHC] #8015: GHC is inconsistent about where LANGUAGE is unsupported.

[GHC]

#8015: GHC is inconsistent about where LANGUAGE is unsupported.
----------------------------------------+-----------------------------------
Reporter:  thoughtpolice                |          Owner:                  
    Type:  bug                          |         Status:  new             
Priority:  normal                       |      Component:  Compiler        
 Version:  7.6.3                        |       Keywords:  parser          
      Os:  Unknown/Multiple             |   Architecture:  Unknown/Multiple
 Failure:  GHC accepts invalid program  |      Blockedby:                  
Blocking:                               |        Related:                  
----------------------------------------+-----------------------------------
 Consider the following file:

 {{{
 {-# LANGUAGE NOINLINE foo bar #-}
 module Main where

 main :: IO ()
 main = return ()
 }}}

 We'd expect this error to occur:

 {{{
 $  ~/ghc/ghc-work/inplace/bin/ghc-stage2 --interactive /tmp/tester.hs
 GHCi, version 7.7.20130624: http://www.haskell.org/ghc/  :? for help
 Loading package ghc-prim ... linking ... done.
 Loading package integer-gmp ... linking ... done.
 Loading package base ... linking ... done.

 /tmp/tester.hs:1:14: Unsupported extension: NOINLINE
 Failed, modules loaded: none.
 Prelude>
 }}}

 Now consider:

 {{{
 module Main where
 {-# LANGUAGE NOINLINE foo bar #-}
 main :: IO ()
 main = return ()
 }}}

 And:

 {{{
 ~/ghc/ghc-work/inplace/bin/ghc-stage2 --interactive /tmp/tester.hs
 GHCi, version 7.7.20130624: http://www.haskell.org/ghc/  :? for help
 Loading package ghc-prim ... linking ... done.
 Loading package integer-gmp ... linking ... done.
 Loading package base ... linking ... done.
 [1 of 1] Compiling Main             ( /tmp/tester.hs, interpreted )
 Ok, modules loaded: Main.
 *Main>
 }}}

 Something like this actually slipped into base and was fixed. See Gabor's
 commit 100c051 which fixed it.

 I was going to attempt to fix this myself but I (probably rightly) backed
 away a little as I understand the code more. This ticket can keep track of
 it, regardless of who fixes it.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/8015>
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