DataKinds and package boundaries: "the 'impossible' happened"

I don't know what is going on there, so I can't really give much more information, sorry.

aristid@sigmoid:~/Code/aws/Examples$ ghc -package-conf ../dist/package.conf.inplace GetObject.hs 
[1 of 1] Compiling Main             ( GetObject.hs, GetObject.o )
ghc: panic! (the 'impossible' happened)
  (GHC version 7.4.2 for x86_64-unknown-linux):
	tyThingTyCon
    Data constructor `aws-0.7.0:Aws.Core.NormalQuery{d r2qt}'

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

Edited Mar 09, 2019 by Simon Peyton Jones

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