#10743: Data declaration order matters to compiler. -------------------------------------+------------------------------------- Reporter: thomaseding | Owner: Type: bug | Status: closed Priority: normal | Milestone: Component: Compiler | Version: 7.8.3 Resolution: invalid | Keywords: Operating System: Windows | Architecture: Type of failure: GHC rejects | Unknown/Multiple valid program | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Changes (by bgamari): * status: new => closed * resolution: => invalid Comment: This is (arguably unfortunately) the expected behavior. See the discussion of "declaration groups" in [https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/template- haskell.html Section 7.17.1] of the User's Guide. In short, splices delimit groups of declarations. Declarations can only be recursive within their group. The usual solution here would be to move the `makeLenses` splice after the `data NonPlayer` definition. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10743#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler