#12099: ghc --show-options lists invalid flags -------------------------------------+------------------------------------- Reporter: DanielG | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.0.1 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: Other Unknown/Multiple | Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- While porting ghc-mod to GHC 8 I noticed that all `-fwarn` flags are missing from `flagsForCompletion` instead only `-fwarn-` and `-fno-warn-` appear. This also shows up in the front-end when running `ghc --show- options`. Looking at the code this turned out to be because the old `-fwarn` flags were marked as hidden using `hideFlag` and hidden flags are explicitly filtered out in `flagsForCompletion` but for some reason the `-fwarn-` and `-fno-warn-` prefixes still show up in the list. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12099 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler