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Simon Marlow authored
Summary: setProgramDynFlags invalidates the whole module graph, forcing everything to be re-summarised (including preprocessing) on every :reload. Looks like this was a bad regression in 8.0, but we didn't notice because there was no test for it. Now there is! Test Plan: * validate * new unit test Reviewers: bgamari, triple, austin, niteria, erikd, jme Subscribers: rwbarton, thomie Differential Revision: https://phabricator.haskell.org/D3398
914842e5