Roundtripping breaks when using exactPrint on single GADT-with-forall

alanz / ghc-exactprint

GHC version of haskell-src-exts exactPrint

BSD 3-Clause "New" or "Revised" License

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Open lspitzner opened 5 years ago

lspitzner commented 5 years ago

Similar to #52,

data StupidExistential a where
  StupidExistential :: forall a . StupidExistential a

breaks when using exactprint on just this module element (I think layouting the whole module is fine.)

Occurs on ghc-8.6.5 but not on ghc-8.4.4.