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+{-# LANGUAGE TemplateHaskell, ExplicitForAll, PolyKinds, TypeApplications #-}
+
+module T19709b where
+
+import GHC.Exts
+import Language.Haskell.TH
+
+$( let levfun :: forall (r :: RuntimeRep) (a :: TYPE r). a -> ()
+ levfun = error "e1" -- NB: this, so far, is OK: no representation-polymorphic binder
+
+ in levfun (error @Any "e2") -- but this is very naughty: representation-polymorphic argument
+ `seq` return [] )