[GHC] #5919: Wrong error message for TH when GHCi is not enabled

[GHC]

#5919: Wrong error message for TH when GHCi is not enabled
-----------------------------------------------+----------------------------
 Reporter:  duncan                             |          Owner:                  
     Type:  bug                                |         Status:  new             
 Priority:  normal                             |      Component:  Compiler        
  Version:  7.0.4                              |       Keywords:                  
       Os:  Unknown/Multiple                   |   Architecture:  Unknown/Multiple
  Failure:  Incorrect warning at compile-time  |       Testcase:                  
Blockedby:                                     |       Blocking:                  
  Related:                                     |  
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 A user reported this confusing error message:

 {{{
 Data/FileEmbed.hs:69:15:
     Template Haskell bracket illegal in a stage-1 compiler
       [| stringToBs |]
 }}}

 The compiler was not stage-1, but:
 {{{
 ghc --info
  [("Project name","The Glorious Glasgow Haskell Compilation System")
  ,("Project version","7.0.4")
  ,("Booter version","7.0.4")
  ,("Stage","2")
  ,("Build platform","powerpc-unknown-linux")
  ,("Host platform","powerpc-unknown-linux")
  ,("Target platform","powerpc-unknown-linux")
  ,("Have interpreter","NO")
  ,("Object splitting","YES")
  ,("Have native code generator","YES")
  ,("Have llvm code generator","YES")
  ,("Support SMP","YES")
  ,("Unregisterised","NO")
 ...
  ]
 }}}

 So it looks like the problem is not stage-1, but the fact that ("Have
 interpreter","NO").

 So the error message should report that the Template Haskell extension
 requires that ghc is built with ghci/interpreter support.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5919>
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