#9949: zipWith too strict in second argument in GHC-7.10.0 -------------------------------------+------------------------------------- Reporter: Lemming | Owner: ekmett Type: bug | Status: new Priority: normal | Milestone: Component: Core | Version: 7.10.1-rc1 Libraries | Operating System: Unknown/Multiple Keywords: | Type of failure: None/Unknown Architecture: | Blocked By: Unknown/Multiple | Related Tickets: Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- correct: {{{ $ ghci-7.8.4 -Wall Prelude> zipWith (==) "" undefined [] }}} incorrect: {{{ $ ghci-7.10.0.20141227 -Wall Prelude> zipWith (==) "" undefined *** Exception: Prelude.undefined }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9949 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler