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ConstraintKinds TH regression from 7.6 -> 7.7

{-# LANGUAGE TemplateHaskell #-}
{-# LANGUAGE ConstraintKinds #-}

module ConstraintKindUser where

-- type Stringy a = (Read a, Show a)
$([d|type Stringy a = (Read a, Show a) |])

Results in this error message:

ConstraintKindUser.hs:7:3:
    The first argument of a tuple should have kind ‛*’,
      but ‛Read a_a2ZZ’ has kind ‛Constraint’
    In the type ‛(Read a_a2ZZ, Show a_a2ZZ)’
    In the type declaration for ‛Stringy’

This is a regression compared to 7.6.3.

Trac metadata
Trac field Value
Version 7.7
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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