Haddock failing example - fails on GHC 8.4.3 cabal-install 2.2.0.0 haddock 2.20.0

Foo.hs

module Foo where

import Paths_haddock_fail (getDataDir)

{-# ANN module (const () getDataDir) #-}

haddock-fail.cabal

name:                haddock-fail
version:             0
data-files:          foo.txt
license:             PublicDomain
author:              Nathan van Doorn
maintainer:          nvd1234@gmail.com
build-type:          Simple
extra-source-files:  ChangeLog.md
cabal-version:       >=1.10

library
  exposed-modules:     Foo
  other-modules:       Paths_haddock_fail
  build-depends:       base >=4.11 && <4.12
  autogen-modules:     Paths_haddock_fail
  default-language:    Haskell2010

Setup.hs

import Distribution.Simple
main = defaultMain

$ cabal haddock
Preprocessing library for haddock-fail-0..
Running Haddock on library for haddock-fail-0..
Haddock coverage:
haddock: ^^ Could not load 'haddockzmfailzm0zmDghRsuKfHRGBBYiTzzCh3fr_Pathszuhaddockzufail_getDataDir_closure', dependency unresolved. See top entry above.


ByteCodeLink.lookupCE
During interactive linking, GHCi couldn't find the following symbol:
  haddockzmfailzm0zmDghRsuKfHRGBBYiTzzCh3fr_Pathszuhaddockzufail_getDataDir_closure
This may be due to you not asking GHCi to load extra object files,
archives or DLLs needed by your current session.  Restart GHCi, specifying
the missing library using the -L/path/to/object/dir and -lmissinglibname
flags, or simply by naming the relevant files on the GHCi command line.
Alternatively, this link failure might indicate a bug in GHCi.
If you suspect the latter, please send a bug report to:
  glasgow-haskell-bugs@haskell.org