:instances Int displays no results on first run
:instances Int
doesn't display any instances the first time it is run but then does the second time. This is probably because some interface files are loaded after the first command is run.
[matt@localhost:~/ghc-artefact-nix]$ ghci
GHCi, version 8.9.0.20190609: https://www.haskell.org/ghc/ :? for help
Prelude> :in
:info :info! :instances
Prelude> :instances Int
Prelude> :instances Int
instance Eq Int -- Defined in ‘GHC.Classes’
instance Ord Int -- Defined in ‘GHC.Classes’
instance Show Int -- Defined in ‘GHC.Show’
instance Read Int -- Defined in ‘GHC.Read’
instance Enum Int -- Defined in ‘GHC.Enum’
instance Num Int -- Defined in ‘GHC.Num’
instance Real Int -- Defined in ‘GHC.Real’
instance Bounded Int -- Defined in ‘GHC.Enum’
instance Integral Int -- Defined in ‘GHC.Real’
Prelude>
cc @xldenis