#12709: GHC panic -------------------------------------+------------------------------------- Reporter: Iceland_jack | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.0.1 Resolution: | Keywords: | LevityPolymorphism Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by simonpj): * keywords: => LevityPolymorphism Comment: We should rejec {{{ a :: BoxUnbox a = let u :: Num (a :: TYPE rep) => a u = 1 + 2 + 3 + 4 }}} because application `1 + blah` has a levity-polymorphic argument. See the paper. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12709#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler