#11520: GHC falls into a hole if given incorrect kind signature -------------------------------------+------------------------------------- Reporter: bgamari | Owner: Type: bug | Status: new Priority: highest | Milestone: 8.0.1 Component: Compiler (Type | Version: 8.0.1-rc1 checker) | Resolution: | Keywords: TypeInType Operating System: Unknown/Multiple | Architecture: Type of failure: Incorrect | Unknown/Multiple warning at compile-time | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by goldfire): The `but does not fail` bit is just to accurately describe the function. As usual, failing is fine, but it means you get fewer error messages at a go. In other words, we can just change the behavior. But I much favor just fixing `fvProv` to do something other than panic on a coercion hole, like return an empty list. There are a bunch of these panics on coercion holes where I thought coercion holes should never be seen. But I've learned that erroneous code can make GHC take paths I hadn't considered. So I'll remove all of these panics and replace them with something that won't crash GHC. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11520#comment:6 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler