#13759: Strange error message for deriving Data -------------------------------------+------------------------------------- Reporter: alanz | Owner: (none) Type: bug | Status: closed Priority: normal | Milestone: Component: Compiler | Version: 8.3 Resolution: duplicate | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: #12245 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by RyanGlScott): * status: new => closed * resolution: => duplicate Comment: Please ignore what I wrote in comment:2, that is utter garbage. The real, //real// cause of what was going on is much simpler: it is indeed a duplicate of #12245. The reason that alanz hit this bug when building https://github.com/ghc/ghc/tree/wip/new-tree-one-param-2 was simply because he was bootstrapping with GHC 8.0.2, and the fix for #12245 didn't land until GHC 8.2. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13759#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler