#14111: strange error when using data families with levity polymorphism and unboxed sums and data families -------------------------------------+------------------------------------- Reporter: carter | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.2.1 Resolution: | Keywords: TypeFamilies Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: 13737 | Blocking: Related Tickets: #14457 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj): I am intensely relaxed about this. It seems to me to be outright confusing to allow type synonyms in the result type of a data constructor signature. Let's just not allow it, and insist on `T` in the result type. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14111#comment:24 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler