[GHC] #8333: The impossible happened with TH + -fno-omit-interface-pragmas

[GHC]

#8333: The impossible happened with TH + -fno-omit-interface-pragmas
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       Reporter:  errge             |             Owner:
           Type:  bug               |            Status:  new
       Priority:  high              |         Milestone:  7.8.1
      Component:  Compiler          |           Version:  7.7
       Keywords:                    |  Operating System:  Unknown/Multiple
   Architecture:  Unknown/Multiple  |   Type of failure:  GHCi crash
     Difficulty:  Unknown           |         Test Case:
     Blocked By:                    |          Blocking:
Related Tickets:                    |
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 {{{
 $ ./ghc-stage2 --interactive Test.hs
 GHCi, version 7.7.20130919: 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             ( /home/errge/tmp/Test.hs, interpreted
 )
 ghc-stage2: panic! (the 'impossible' happened)
   (GHC version 7.7.20130919 for i386-unknown-linux):
         toIfaceTickish

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

 >
 Leaving GHCi.
 }}}

 With Test.hs being:
 {{{
 {-# LANGUAGE TemplateHaskell #-}
 {-# OPTIONS_GHC -fno-omit-interface-pragmas #-}

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

 I want to make TemplateHaskell generated non-essential info visible even
 with -O0.  Compilation works, everything is fine.  But I can't load source
 code like this with GHCi, which is annoying.

 Setting priority to high, since this is a crash.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8333>
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