[GHC] #10284: Create a dedicated `TypeError` exception type

[GHC]

#10284: Create a dedicated `TypeError` exception type
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        Reporter:  kosmikus          |                   Owner:  kanetw
            Type:  feature request   |                  Status:  patch
        Priority:  normal            |               Milestone:
       Component:  Core Libraries    |                 Version:  7.10.1
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  None/Unknown      |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:  phab:D866
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Comment (by Ben Gamari <ben@…>):

 In [changeset:"9a3e1657db4c0292fc06d6183a802af631c3666a/ghc"]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="9a3e1657db4c0292fc06d6183a802af631c3666a"
 Deferred type errors now throw TypeError (#10284)

 Depends on D864.

 Previous behaviour was ErrorCall, which might mask issues in tests
 using -fdefer-type-errors

 Signed-off-by: David Kraeutmann <kane at kane.cx>

 Test Plan: Test whether the error thrown is indeed TypeError and not
 ErrorCall.

 Reviewers: hvr, nomeata, austin

 Reviewed By: nomeata, austin

 Subscribers: nomeata, simonpj, thomie

 Differential Revision: https://phabricator.haskell.org/D866

 GHC Trac Issues: #10284
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10284#comment:8>
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