[GHC] #11988: All ghc-compiled binaries seg-fault (on Windows)

[GHC]

#11988: All ghc-compiled binaries seg-fault (on Windows)
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        Reporter:  simonpj       |                Owner:
            Type:  bug           |               Status:  closed
        Priority:  highest       |            Milestone:
       Component:  Compiler      |              Version:  8.1
      Resolution:  fixed         |             Keywords:
Operating System:  Windows       |         Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown  |            Test Case:
      Blocked By:                |             Blocking:
 Related Tickets:                |  Differential Rev(s):
       Wiki Page:                |
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Changes (by simonpj):

 * status:  infoneeded => closed
 * resolution:   => fixed


Comment:

 Ah... I think it turned out to be a bad patch which we rolled back.  (I
 think simonmar then fixed it.)

 I'll close this

 Simon

 I think the revert was this
 {{{
 commit 546f24e4f8a7c086b1e5afcdda624176610cbcf8
 Author: Simon Peyton Jones <simonpj at microsoft.com>
 Date:   Thu Apr 28 15:20:43 2016 +0100

     Revert "Use __builtin_clz() to implement log_2()"

     This reverts commit 24864ba5587c1a0447beabae90529e8bb4fa117a.

  rts/sm/BlockAlloc.c | 32 +++++++++++---------------------
  1 file changed, 11 insertions(+), 21 deletions(-)
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11988#comment:3>
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