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Ryan Scott authored
Summary: To fix this issue, we simply disable `RebindableSyntax` whenever we rename the code generated from a deriving clause. Fixes #12688. Test Plan: make test TEST=T12688 Reviewers: simonpj, austin, bgamari Reviewed By: simonpj, bgamari Subscribers: thomie Differential Revision: https://phabricator.haskell.org/D2591 GHC Trac Issues: #12688 (cherry picked from commit b501709e)
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