[GHC] #14890: Make Linux slow validate green

[GHC]

#14890: Make Linux slow validate green
-------------------------------------+-------------------------------------
        Reporter:  bgamari           |                Owner:  alpmestan
            Type:  task              |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.2.2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  D4546
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by Ben Gamari <ben@…>):

 In [changeset:"d9d801516dccab88b8083d34b465ee9ca8deb92f/ghc"
 d9d80151/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="d9d801516dccab88b8083d34b465ee9ca8deb92f"
 testsuite: Fix `./validate --slow`

 This fixes all unexpected passes and unexpected failures from a
 `./validate --slow` run I did last week. I commented on many
 tickets and created a few more as I was going through the failing
 tests. A summary of the entire process is available at:

   https://gist.github.com/alpmestan/c371840968f086c8dc5b56af8325f0a9

 This is part of an attempt to have `./validate --slow` pass,
 tracked in #14890. Another patch will be necessary for the unexpected
 stats failures.

 Test Plan: ./validate --slow (not green yet)

 Reviewers: bgamari, simonmar

 Subscribers: thomie, carter

 Differential Revision: https://phabricator.haskell.org/D4546
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14890#comment:5>
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