#13900: Core lint in BuildFlavour=perf-llvm -------------------------------------+------------------------------------- Reporter: bgamari | Owner: bgamari Type: bug | Status: new Priority: highest | Milestone: 8.6.1 Component: Compiler | Version: 8.3 Resolution: | Keywords: 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 dfeuer): I can cut down `GHCi.UI.Tags` and still get a similar core lint error. As I cut it down, the mismatched types shifted around a bit; unfortunately I didn't capture the intermediate steps, so I can't show them. This version is cut down about as far as I could cut it: {{{#!hs module GHCi.UI.Tags ( createTagsFile ) where import GHC import GHCi.UI.Monad data TagsKind data TagInfo createTagsFile :: TagsKind -> FilePath -> GHCi () createTagsFile _tagskind _tagsFile = do _graph <- GHC.getModuleGraph mapM_ (listModuleTags . GHC.ms_mod) $ [undefined] {-# NOINLINE listModuleTags #-} listModuleTags :: GHC.Module -> GHCi [TagInfo] listModuleTags m = let {-# NOINLINE names #-} names = [] localNames = filter ((m ==) . nameModule) names in mapM GHC.lookupName localNames >> return [] }}} Lots of the little bits remaining seem to be necessary: the `filter`, the `GHC.getModuleGraph`, the `mapM` in `listModuleTags` rather than `mapM_`. I'll keep digging now that I've cut it down, but I figured I should record this. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13900#comment:10 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler