#16260: Use of plugins causes -XSafe to fail -------------------------------------+------------------------------------- Reporter: watashi | Owner: watashi Type: bug | Status: closed Priority: normal | Milestone: Component: Compiler | Version: 8.7 Resolution: fixed | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: GHC rejects | Unknown/Multiple valid program | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by mpickering): I'm sympathetic to this but the fact is a plugin can arbitrarily change `TcGblEnv` so the only option is to mark the affected modules as `Unsafe`. Perhaps a better solution is to make all the fields which can modify the AST return `Maybe` so that if any modifications take place then the module is marked `Unsafe`. Plugins can return `Nothing` if they want to purely inspect information. I'm reluctant to do this though purely to satisfy safe haskell checks. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/16260#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler