#14765: Levity polymorphism panic -------------------------------------+------------------------------------- Reporter: dfeuer | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.6.1 Component: Compiler | Version: 8.5 Resolution: | Keywords: | LevityPolymorphism Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple crash or panic | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by goldfire): So are you suggesting that this new `mkCoreApp` doesn't use `isUnliftedType`, but instead re-creates it? Who reports the LP error? I suppose that could remain the same as it is right now... but then the check in `mkCoreApp` will be redundant. To be clear, I am OK with having a special `mkCoreApp` that doesn't panic on an LP argument used in the desugarer, as long as `isUnliftedType` still panics. My worry here is more about performance, but perhaps it would be an improvement over the status quo. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14765#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler