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Commit 82b77ec3 authored by Simon Peyton Jones's avatar Simon Peyton Jones
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Do not quantify over deriving clauses 

Trac #14331 showed that in a data type decl like

   data D = D deriving (C (a :: k))

we were quantifying D over the 'k' in the deriving clause.  Yikes.

Easily fixed, by deleting code in RnTypes.extractDataDefnKindVars

See the discussion on the ticket, esp comment:8.
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