[GHC] #12757: Compiled program segfaults at -O1

[GHC]

#12757: Compiled program segfaults at -O1
-------------------------------------+-------------------------------------
        Reporter:  hvr               |                Owner:
            Type:  bug               |               Status:  new
        Priority:  highest           |            Milestone:  8.0.2
       Component:  Compiler          |              Version:  8.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Runtime crash     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #11312, #12585    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by Ben Gamari <ben@…>):

 In [changeset:"b5460dd6e54f4ba54bfb11469221e8c8f957e964/ghc" b5460dd/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="b5460dd6e54f4ba54bfb11469221e8c8f957e964"
 Add testcase for #12757

 Test Plan: Validate, expected to fail

 Reviewers: austin

 Subscribers: thomie

 Differential Revision: https://phabricator.haskell.org/D2665

 GHC Trac Issues: #12757
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12757#comment:8>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler