#16002: Type family equation with wrong name is silently accepted (GHC 8.6+ only) -------------------------------------+------------------------------------- Reporter: RyanGlScott | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.8.1 Component: Compiler | Version: 8.6.2 Resolution: | Keywords: TypeFamilies Operating System: Unknown/Multiple | Architecture: Type of failure: GHC accepts | Unknown/Multiple invalid program | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj): Ah yes, good catch. I think the Right Thing is to move the test out of `kcTyFamInstEqn` and put it in `RnSource.rnFamInstEqn`. That way it'll be nailed by the renamer, which has plenty of information to give a good error message. Would you consider doing that? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/16002#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler