#11195: New pattern-match check can be non-performant -------------------------------------+------------------------------------- Reporter: goldfire | Owner: goldfire Type: bug | Status: closed Priority: highest | Milestone: 8.0.1 Component: Compiler | Version: 7.11 Resolution: fixed | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple crash | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D1676 Wiki Page: | -------------------------------------+------------------------------------- Changes (by bgamari): * status: new => closed * differential: => Phab:D1676 * resolution: => fixed Comment: The above patch teaches the pattern checker to run the patterns which it will check through a heuristic to determine whether it may result in the blow-up documented in this ticket. If there is a good chance things will explode the checker will run a simplified, but more performant, check. This should prevent this issue from affecting users in most cases. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11195#comment:7 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler