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Simon Peyton Jones authored
We were't checking that a 'data/type instance' was extending a family type constructor. Merge to 6.10 if we ever release 6.10.3 (or do it for 6.10.2).
cc9a63c2
We were't checking that a 'data/type instance' was extending a family type constructor. Merge to 6.10 if we ever release 6.10.3 (or do it for 6.10.2).