A couple more bugs in --enable-multi-repl , one of which is a showstopper #11309
Description
Besides #1300, here are some other bugs I've hit:
1. I get warnings for modules "not listed in other-modules" when they are, in fact, listed in other-modules.
The false warning does not appear if I build the package or disable multi-repl.
(This one isn't a showstopper.)
2. "error: [GHC-39999] missing instance" for instances that definitely exist
For instance, "No instance for 'Integral Nat32'" when there is a perfectly cromulent
instance Integral Nat32 where ...
in the same module that defines Nat32.
Even better is "No instance for 'Ord FParseErr'" when
newtype FParseErr = GenerParseErr Text deriving (Eq, Show, Ord)
None of these errors appear if I use cabal build or load single packages into the repl.
This error makes --enable-multi-repl unusable for me.
Info
$ cabal --version
cabal-install version 3.16.0.0
compiled using version 3.16.0.0 of the Cabal library (in-tree)
$ ghc --version
The Glorious Glasgow Haskell Compilation System, version 9.6.6
from Nixpkgs on NixOS