Windows breakage -- again

[Johan Tibell]

On Tue, Jul 22, 2014 at 9:50 AM, Niklas Larsson <metaniklas at gmail.com> wrote:
> AtomicPrimOps.hs flakes out for:
> fetchAndTest
> fetchNandTest
> fetchOrTest
> fetchXorTest
> casTest
>
> but not for fetchAddSubTest and readWriteTest.
>
> If I step through it, the segfault comes at line 166, it doesn't reach the
> .fetchXXXIntArray function that was called from the thread (at least ghci
> doesn't hit a breakpoint set at it).
>
> GDB says the bad instruction is:
>     4475:    f0 8b 4c 24 40           lock mov 0x40(%esp),%ecx

Is this on FreeBSD only or does it happen elsewhere?