#10586: GHC 7.10.1 panic due to wildcard in data family instance -------------------------------------+------------------------------------- Reporter: WrenThornton | Owner: Type: bug | Status: closed Priority: normal | Milestone: Component: Compiler | Version: 7.10.1 Resolution: fixed | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: #3699 | Differential Revisions: -------------------------------------+------------------------------------- Comment (by thomasw): Replying to [comment:5 simonpj]:
Is it committed, or simply in Phab? Is there a regression test? If so can you update the "Test case" field? If not can you add one? Thanks
[https://git.haskell.org/ghc.git/commit/058af6c90a0e8d122f2d1339b6b4fd0b5ec83... Yes]. I have a test for a wild card in a type instance, I'll add one for this too then. I'm actually thinking about adding support for wild cards in data/type instances. I would just replace them with fresh meta variables. This would also address #3699. I don't think named wild cards or extra-constraints wild cards make sense here. What do you think? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10586#comment:6 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler