#14686: -XStrict language extension makes behavior change -------------------------------------+------------------------------------- Reporter: jeiea | Owner: (none) Type: bug | Status: closed Priority: normal | Milestone: Component: Compiler | Version: 8.2.2 Resolution: invalid | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by simonpj): * status: new => closed * resolution: => invalid Comment: With `-XStrict`, the `where` binding is strict (see 10.28.3 in [http://downloads.haskell.org/~ghc/master/users-guide/glasgow_exts.html #bang-patterns-and-strict-haskell the user manual]). So every call to `shouldBe0 x` calls `shouldBe0 (x-1)`, which calls `shouldBe0 (x-2)` and so on. Hence divergence. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14686#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler