On Tue, Dec 8, 2015 at 12:36 PM John Wiegley <jwiegley@gmail.com> wrote:

>
> Nice backtrace, thank you. I wonder what object XCAR is being applied to,
> that
> it would segfault like this.
>

Seems garbagy; see my earlier response to Eli.


>
> Does this happen consistently, even if you don't know exactly what caused
> it?
>

Nope, it seems quite random.  I've probably seen it a total of 3 or 4
times.