GHCi doesn't remember let-less function declarations with -fobject-code

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 here.

Trac metadata

Trac field	Value
Version	8.2.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	GHCi
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