#12526: regression in type inference with respect to type families -------------------------------------+------------------------------------- Reporter: Lemming | Owner: Type: bug | Status: new Priority: highest | Milestone: 8.0.2 Component: Compiler (Type | Version: 8.1 checker) | Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: GHC rejects | Unknown/Multiple valid program | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by niteria):
It seems that this might be related to the work that Bartosz has done in making GHC more deterministic.
That is, the error already existed in ghc-8.0.1 but was not always triggered.
Most of the determinism patches were merged *after* ghc-8.0.1, so it sounds unlikely. My best bet would be that some exposed thing isn't recorded in the interface file. Lemming: Can you provide step by step repro? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12526#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler