Cannot put (.) or (!) type operators into an export list

Thanks to recent work in GHC HEAD, it is now possible to define type operators named (.) and (!):

type (f . g) x = f (g x)
type x ! f = f x

However, I was surprised to discover that it's not possible to put them in an export list! That is to say, this program doesn't parse:

{-# LANGUAGE TypeOperators #-}
module Bug (type (.), type (!)) where

type (f . g) x = f (g x)
type x ! f = f x

$ ~/Software/ghc4/inplace/bin/ghc-stage2 --interactive Bug.hs
GHCi, version 8.7.20190219: https://www.haskell.org/ghc/  :? for help
Loaded GHCi configuration from /home/rgscott/.ghci

Bug.hs:2:19: error: parse error on input ‘.’
  |
2 | module Bug (type (.), type (!)) where
  |                   ^

This problem appears to be specific to the (.) and (!) type operators, since any other type operator will work in its place:

{-# LANGUAGE TypeOperators #-}
module Works (type (&)) where

type (f & g) x = f (g x)

Trac metadata

Trac field	Value
Version	8.7
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler (Parser)
Test case
Differential revisions
BlockedBy
Related
Blocking
CC	int-index
Operating system
Architecture