#14549: RecordWildCards doesn't work properly in repl -------------------------------------+------------------------------------- Reporter: akegalj | Owner: (none) Type: bug | Status: new Priority: lowest | Milestone: Component: GHCi | Version: 8.2.1 Keywords: repl, | Operating System: Unknown/Multiple recordwildcards | Architecture: | Type of failure: Incorrect result Unknown/Multiple | at runtime Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- {{{#!hs Prelude> :set -XRecordWildCards Prelude> data Test = Test { t1 :: Int, t2 :: Int } deriving Show Prelude> t1 = 2 Prelude> Test { t2 = 2, ..} <interactive>:15:1: warning: [-Wmissing-fields] • Fields of 'Test' not initialised: t1 • In the expression: Test {t2 = 2, ..} In an equation for 'it': it = Test {t2 = 2, ..} <interactive>:15:1: warning: [-Wmissing-fields] • Fields of 'Test' not initialised: t1 • In the expression: Test {t2 = 2, ..} In an equation for 'it': it = Test {t2 = 2, ..} Test {t1 = *** Exception: <interactive>:15:1-18: Missing field in record construction t1 }}} I would expect above to return `Test {t1 = 2, t2 = 2}` instead of throwing an error. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14549 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler