#14108: GHCi doesn't remember let-less function declarations with -fobject-code -------------------------------------+------------------------------------- Reporter: RyanGlScott | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: GHCi | Version: 8.2.1 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: GHC rejects Unknown/Multiple | valid program Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- GHCi supports two styles of function declaration: those using an explicit `let` keyword, and those without. This GHCi session demonstrates both: {{{ $ /opt/ghc/8.2.1/bin/ghci GHCi, version 8.2.1: http://www.haskell.org/ghc/ :? for help Loaded GHCi configuration from /home/rgscott/Documents/Hacking/Haskell/trifecta/.ghci Loaded GHCi configuration from /home/rgscott/.ghci λ> let foo1 :: Int; foo1 = 42 λ> foo1 42 λ> foo2 :: Int; foo2 = 42 λ> foo2 42 }}} But if using GHCi with the `-fobject-code` enabled, then the `let`-less style of declaration no longer works: {{{ $ /opt/ghc/8.2.1/bin/ghci -fobject-code GHCi, version 8.2.1: http://www.haskell.org/ghc/ :? for help Loaded GHCi configuration from /home/rgscott/Documents/Hacking/Haskell/trifecta/.ghci Loaded GHCi configuration from /home/rgscott/.ghci λ> let foo1 :: Int; foo1 = 42 λ> foo1 42 λ> foo2 :: Int; foo2 = 42 λ> foo2 <interactive>:4:1: error: • Variable not in scope: foo2 • Perhaps you meant ‘foo1’ (line 1) }}} Originally noticed [https://github.com/ekmett/trifecta/pull/73#issuecomment-321829537 here]. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14108 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler