[Bug 31666] New: crash after win64 programs exit when more than 1 core available?

http://bugs.winehq.org/show_bug.cgi?id=31666

Bug #: 31666
           Summary: crash after win64 programs exit when more than 1 core
                    available?
           Product: Wine
           Version: 1.5.12
          Platform: x86
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: -unknown
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]
    Classification: Unclassified

For some time now, after I run a 64 bit program, even something as simple as

./wine64 cmd /c echo hi

a few seconds later, I see

err:seh:call_stack_handlers invalid frame 2410f0 (0x142000-0x240000)
err:seh:raise_exception Exception frame is not in stack limits => unable to
dispatch exception.
wine client error:13: write: Bad file descriptor
err:seh:call_stack_handlers invalid frame 2410f0 (0x142000-0x240000)
err:seh:raise_exception Exception frame is not in stack limits => unable to
dispatch exception.
wine client error:1c: write: Bad file descriptor
err:seh:call_stack_handlers invalid frame 2410f0 (0x142000-0x240000)
err:seh:raise_exception Exception frame is not in stack limits => unable to
dispatch exception.
wine client error:1c: write: Bad file descriptor

If I run on only a single core, the problem does not happen, e.g. there's
no error with
$ taskset 1 ./wine64 cmd /c echo hi

This is on an i7 with 8 logical cores.