#11303: Pattern matching against sets of strings sharing a prefix blows up pattern checker -------------------------------------+------------------------------------- Reporter: bgamari | Owner: Type: bug | Status: new Priority: highest | Milestone: 8.0.1 Component: Compiler | Version: 7.11 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple performance bug | Test Case: T11303 Blocked By: | Blocking: Related Tickets: #11302 | Differential Rev(s): Phab:D1716, Wiki Page: | Phab:D1719 -------------------------------------+------------------------------------- Comment (by RyanGlScott): Another reason it's probably #11276 instead is because the same workaround can be applied to `text-icu`: {{{#!diff index 38765d4..c31f4b6 100644 --- a/Data/Text/ICU/Regex/Internal.hsc +++ b/Data/Text/ICU/Regex/Internal.hsc @@ -174,6 +174,7 @@ toURegexpOpts = foldl go (0,-1,-1) where go (!flag,work,stack) opt = (flag+flag',work',stack') where + flag' :: URegexpFlag flag' = case opt of CaseInsensitive -> #const UREGEX_CASE_INSENSITIVE Comments -> #const UREGEX_COMMENTS }}} Adding a type signature makes the rest of `text-icu` compile. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11303#comment:12 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler