#14978: GADTs don't seem to unpack properly -------------------------------------+------------------------------------- Reporter: dfeuer | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.6.1 Component: Compiler | Version: 8.2.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Runtime | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by Simon Peyton Jones <simonpj@…>): In [changeset:"9187d5fb1d3d38a4e607b0d61784c21447c8195b/ghc" 9187d5fb/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="9187d5fb1d3d38a4e607b0d61784c21447c8195b" Allow unpacking of single-data-con GADTs Trac #14978 pointed out that single-constructor GADTs should be unpackable without trouble. Acutally I realise that even existentials should be unpackable too, but that's a bit more work, so it's not part of this patch. See Note [Unpacking GADTs and existentials] in MkId. }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14978#comment:1> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler