Panic when quoting a scoped type variable

{-# LANGUAGE TemplateHaskell, ScopedTypeVariables #-}
module GetNameOfThing where

import Language.Haskell.TH

f :: a -> Name
f (x :: a) = ''a

ghc: panic! (the 'impossible' happened)
  (GHC version 7.2.2 for i386-unknown-linux):
	th_bracket a{tv ahF}

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

The function is probably nonsense, but the error message could be friendlier.

Tested on GHC 7.2.2.

Trac metadata

Trac field	Value
Version	7.2.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
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