[GHC] #14108: GHCi doesn't remember let-less function declarations with -fobject-code

[GHC]

#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>
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