[GHC] #15544: Non-deterministic segmentation fault in cryptohash-sha256 testsuite

[GHC]

#15544: Non-deterministic segmentation fault in cryptohash-sha256 testsuite
-------------------------------------+-------------------------------------
        Reporter:  bgamari           |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  highest           |            Milestone:  8.6.1
       Component:  Compiler          |              Version:  8.4.3
      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:                    |
-------------------------------------+-------------------------------------
Changes (by bgamari):

 * cc: simonmar (added)


Comment:

 It is looking very much like this is due to the SRT rework. Specifically,
 I bisected this down to one of the following:
 {{{
 There are only 'skip'ped commits left to test.
 The first bad commit could be any of:
 f2d27c1ad69321872a87a37144fe41e815301f5b
 0c7db226012b5cfafc9a38bfe372661672ec8900
 b701e4754d1d6286e233c73d7360926f3eaae577
 4ffaf4b67773af4c72d92bb8b6c87b1a7d34ac0f
 5f15d53a98ad2f26465730d8c3463ccc58f6d94a
 99f8cc84a5b23878b3b0732955cb651bc973e9f2
 f27e4f624fe1270e8027ff0a14f03514f5be31b7
 126b4125d95f7e4d272a9307cb8b634b11bd337f
 5d3b15ecbf17b7747c2f7313a981c60a2d22904d
 3310f7f14c0ba34a57fe5a77f47d2a66fe838a43
 819b9cfd21a1773091cec4e34716a0fd7c7d05c6
 01bb17fd4dc6d92cf08632bbb62656428db6e7fa
 797a46239d958841219f0f7769b0016b1b23d5ca
 838b69032566ce6ab3918d70e8d5e098d0bcee02
 efe405447b9fa88cebce718a6329091755deb9ad
 2b0918c9834be1873728176e4944bec26271234a
 2bbdd00c6d70bdc31ff78e2a42b26159c8717856
 5a7c657e02b1e801c84f26ea383f326234cd993c
 fbd28e2c6b5f1302cd2d36d79149e3b0a9f01d84
 ae292c6d1362f34117be75a2553049cec7022244
 eb8e692cab7970c495681e14721d05ecadd21581
 d78dde9ff685830bc9d6bb24a158eb31bb8a7028
 We cannot bisect more!

 }}}

 Unfortunately bisecting through these has been extremely messy due to non-
 building commits.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15544#comment:9>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler