[GHC] #10354: ApiAnnotations : parens around a context with wildcard loses annotations

[GHC]

#10354: ApiAnnotations : parens around a context with wildcard loses annotations
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              Reporter:  alanz       |             Owner:  alanz
                  Type:  bug         |            Status:  new
              Priority:  normal      |         Milestone:
             Component:  Compiler    |           Version:  7.10.1
              Keywords:              |  Operating System:  Unknown/Multiple
  ApiAnnotations                     |   Type of failure:  None/Unknown
          Architecture:              |        Blocked By:
  Unknown/Multiple                   |   Related Tickets:
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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 In the following code, the extra set of parens around the context end up
 with detached annotations.

 {{{#!hs
 {-# LANGUAGE PartialTypeSignatures #-}
 module ParensAroundContext where

 f :: ((Eq a, _)) => a -> a -> Bool
 f x y = x == y
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10354>
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