#16313: Core Lint warning (Unsafe coercion: {left,right}-hand type is levity- polymorphic) -------------------------------------+------------------------------------- Reporter: RyanGlScott | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.6.3 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by goldfire): Hrm. Maybe I was too quick to say that any bleating from core-lint meant we have a GHC bug. I've never been comfortable with this sort of check, really. I advocate dropping the check... or finding a way to suppress the warning. Simon, this comes from #9122, where you wanted to institute this sorts of checks. The problem is that there's no way of getting rid of the warning (while keeping the more important `-dcore-lint` checks enabled). -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/16313#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler