#9010: TemplateHaskell leads to an "unknown symbol" error -------------------------------------+------------------------------------- Reporter: Feuerbach | Owner: Type: bug | Status: new Priority: high | Milestone: Component: Compiler | Version: 7.10.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by rwbarton): I could not reproduce this on Debian Linux. Does "... and build `play` manually" mean something other than...? {{{ cabal sandbox init cabal install hs-opencv-binding/ cabal install play/ }}} Also I seriously doubt that lens is required, can you try simplifying `makeLenses ''MyRecord` to just a `return []`? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9010#comment:8 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler