#4012: Compilation results are not deterministic -------------------------------------+------------------------------------- Reporter: kili | Owner: niteria Type: bug | Status: new Priority: high | Milestone: 8.2.1 Component: Compiler | Version: 6.12.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: Other | Test Case: Blocked By: 11362 | Blocking: Related Tickets: #10424 | Differential Rev(s): Phab:D910, | Phab:D1073, Phab:D1133, Phab:D1192, | Phab:D1268, Phab:D1360, Phab:D1373, Wiki Page: | Phab:D1396, Phab:D1457, Phab:D1468, DeterministicBuilds | Phab:D1487, Phab:D1504, Phab:D1508 -------------------------------------+------------------------------------- Comment (by Bartosz Nitka <niteria@…>): In [changeset:"be4708513fc04dd9c9c99fe652503866ecd85c15/ghc" be470851/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="be4708513fc04dd9c9c99fe652503866ecd85c15" Kill nameSetElems in rnCmdTop This change isn't necessary for determinism. appAName, choiceAName, loopAName all have pre-allocated Uniques and their relative order can't change. I opted to use nameSetElemsStable here because: * the cost is negligible * it's less fragile than just documenting Test Plan: ./validate Reviewers: simonpj, austin, bgamari, simonmar Reviewed By: simonmar Subscribers: thomie Differential Revision: https://phabricator.haskell.org/D2292 GHC Trac Issues: #4012 }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/4012#comment:181> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler