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Data constructor operators mis-printed in Template Haskell

When I say

{-# LANGUAGE TemplateHaskell #-}
{-# OPTIONS_GHC -ddump-splices -dsuppress-uniques #-}

module Bug where

$([d| data Foo = (:!) |])

I get

Bug.hs:6:3-24: Splicing declarations
    [d| data Foo = :! |] ======> data Foo = :!

There are missing parentheses in that output.

Trac metadata
Trac field Value
Version 7.10.2
Type Bug
TypeOfFailure OtherFailure
Priority normal
Resolution Unresolved
Component Template Haskell
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture
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