#9112: support for deriving Vector/MVector instances -------------------------------------+------------------------------------ Reporter: jwlato | Owner: Type: feature request | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.8.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Unknown/Multiple Type of failure: None/Unknown | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: -------------------------------------+------------------------------------ Comment (by tibbe): Replying to [comment:7 simonpj]:
I have no idea what all this means. But it looks plausible that it's the same issue, and is rightly rejected on the grounds that it could be unsound. We have yet to figure out a way to solve this; see #9123.
I can't tell, from the cabal message, whether cabal gave up early or there's in fact no install plan possible. If it's the former then cabal- install-1.20.0.2 (released last weekend) has several solver improvements that might let it find a solution that lets you build. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9112#comment:8> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler