Panics when making a quotation as pattern synonym

$ ghci -XPatternSynonyms -XViewPatterns -ignore-dot-ghci
GHCi, version 8.0.1: http://www.haskell.org/ghc/  :? for help
Prelude> :m + Language.Haskell.TH
Prelude Language.Haskell.TH> pattern A :: ExpQ; pattern A <- (undefined -> ()) where A = undefined
ghc: panic! (the 'impossible' happened)
  (GHC version 8.0.1 for x86_64-unknown-linux):
        nameModule system $dIP_a4HS

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

Prelude Language.Haskell.TH> 

should we be able to use quotations that are pattern synonyms? I have no use for this.

Trac metadata

Trac field	Value
Version	8.0.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
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