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thomasw authored
Summary: Disallow wildcards in stand-alone deriving instances (StandaloneDeriving), default signatures (DefaultSignatures) and instances signatures (InstanceSigs). Test Plan: validate Reviewers: austin Reviewed By: austin Subscribers: carter, thomie, monoidal Differential Revision: https://phabricator.haskell.org/D595 GHC Trac Issues: #9922
c9532f81