> On Aug 10, 2016, at 10:41 AM, Konstantin Belousov <kostik...@gmail.com> wrote:
> On Wed, Aug 10, 2016 at 10:33:23AM -0400, Matteo Riondato wrote:
>> Hi all,
>> I recently upgraded from a late June (pre 11-branch, as far as I can tell) 
>> revision to r303771.
>> Now, running ???make update??? (or buildworld, ???) in /usr/src fails with a 
>> signal 12:
>> matteo@triton:/usr/src$ sudo make update
>> Password:
>> *** Signal 12
> You did not updated, I think.  You, most likely, inly updated the kernel,
> but left the old userspace in place, at least libc.

That would be surprising but it may have happened, as I don’t remember without 
doubts to have run installworld :/

> Signal 12 is SIGSYS, which means that the program tries to use a syscall
> not implemented by the kernel.  My guess is that your kernel lacks option
> COMPAT_FREEBSD10, and the failing syscall is pipe(2).

Indeed I do not have COMPAT_FREEBSD10, because I believed my previous world 
revision was >302092, as noted by the entry about pipe(2) in UPDATING.

Any suggestion on how to fix this?
Boot the old kernel, add COMPAT_FREEBSD10 to kernel config, and rebuild/install 
world and kernel perhaps?

Thanks for the help!


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