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niteria authored
varEnvElts didn't introduce nondeterminism here. This makes it obvious that it could and explains why it doesn't. Test Plan: ./validate Reviewers: bgamari, simonmar, austin, simonpj Reviewed By: simonpj Subscribers: thomie Differential Revision: https://phabricator.haskell.org/D2228 GHC Trac Issues: #4012
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