#12368: Demand Analyzer: Cunnig plan not adhered to with aborting fixpoint interation -------------------------------------+------------------------------------- Reporter: nomeata | Owner: Type: bug | Status: patch Priority: low | Milestone: Component: Compiler | Version: 8.0.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D2392 Wiki Page: | -------------------------------------+------------------------------------- Comment (by nomeata): Fixed the problem, by adding a topDmd demand on all free variables mentioned in the strictness signature of the binders to `lazy_fvs`, before throwing away the strictness signature. Fixes this test case. Code on Phab and the branch, currently awaiting validation. While I am at it: `splitFVs` in `Demand.hs` has some intricate special handling for thunks, without any comment or justification. Do you have any idea why that is there, and whether it is still required? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12368#comment:14 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler