The impossible happened with TH + -fno-omit-interface-pragmas

$ ./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.

Trac metadata

Trac field	Value
Version	7.7
Type	Bug
TypeOfFailure	OtherFailure
Priority	high
Resolution	Unresolved
Component	Compiler
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