[GHC] #15173: Tests are failing with segfaults under CircleCI

[GHC]

#15173: Tests are failing with segfaults under CircleCI
-------------------------------------+-------------------------------------
        Reporter:  bgamari           |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  highest           |            Milestone:  8.6.1
       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):
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by simonmar):

 Can't repro with a quick build, trying to add `-O2` to `GhcLibHcOpts` and
 `GhcStage2HcOpts` now.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15173#comment:4>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler