[GHC] #15168: GHC HEAD crashes on Windows 64 after the SRT overhaul (May 16, 2018 and newer)

[GHC]

#15168: GHC HEAD crashes on Windows 64 after the SRT overhaul (May 16, 2018 and
newer)
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        Reporter:  awson             |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  highest           |            Milestone:  8.6.1
       Component:  Compiler          |              Version:  8.5
      Resolution:                    |             Keywords:
Operating System:  Windows           |         Architecture:  x86_64
 Type of failure:  Compile-time      |  (amd64)
  crash or panic                     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by simonmar):

 Could someone who is able to repro this, please recompile stage 2 with
 `-debug`:

 {{{
 cd ghc
 make re2 GhcDebugged=YES
 }}}

 and then see if the error message is different. This will tell us whether
 it's a case of some CAF being garbage collected when it shouldn't be, or
 something else.

 (incidentally the above workflow would be good to support in Hadrian, it's
 something I do a lot)

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15168#comment:6>
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