FreeBSD user environment repeatedly inferior to kernel (was: uname -KU 1500001 1500000)

From: Graham Perrin <grahamperrin_at_gmail.com>
Date: Wed, 15 Nov 2023 07:17:02 UTC
On Sun, 1 Oct 2023 at 20:28, Graham Perrin <grahamperrin@gmail.com> wrote:

> User environment (1500000) inferior to kernel (1500001).
>
> …

I discovered a comparable mismatch from build and installation on 9th
November. Any ideas?

I use devel/ccache4 4.8, if that's relevant.

Copied from <paste.purplehat.org/view/0a62602e>:

% uname -KU
1500003 1500001
% uname -a
FreeBSD mowa219-gjp4-8570p-freebsd 15.0-CURRENT FreeBSD 15.0-CURRENT
#3 main-n266317-f5b3e686292b-dirty: Thu Nov  9 12:49:29 GMT 2023
grahamperrin@mowa219-gjp4-8570p-freebsd:/usr/obj/usr/src/amd64.amd64/sys/GENERIC-NODEBUG
amd64
% grep -C 2 completed\ on /var/log/buildworld.log

--------------------------------------------------------------
>>> World build completed on Thu Nov  9 10:31:19 GMT 2023
>>> World built in 3208 seconds, ncpu: 8, make -j4
--------------------------------------------------------------
% grep -C 2 completed\ on /var/log/buildkernel.log
     4356.16 real      2766.18 user       363.33 sys
--------------------------------------------------------------
>>> Kernel build for GENERIC completed on Thu Nov  9 11:43:59 GMT 2023
--------------------------------------------------------------
--------------------------------------------------------------
--
     4002.48 real      2817.89 user       367.08 sys
--------------------------------------------------------------
>>> Kernel build for GENERIC-NODEBUG completed on Thu Nov  9 12:50:48 GMT 2023
--------------------------------------------------------------
>>> Kernel(s)  GENERIC GENERIC-NODEBUG built in 8369 seconds, ncpu: 8, make -j4
% grep -C 1 completed\ on /var/log/installkernel.log
--------------------------------------------------------------
>>> Installing kernel GENERIC completed on Thu Nov  9 20:22:06 GMT 2023
--------------------------------------------------------------
--
--------------------------------------------------------------
>>> Installing kernel GENERIC-NODEBUG completed on Thu Nov  9 20:23:48 GMT 2023
--------------------------------------------------------------
% grep -C 2 everything\ completed\ on /var/log/installworld.log
       28.98 real        16.25 user        12.06 sys
--------------------------------------------------------------
>>> Installing everything completed on Fri Nov 10 00:36:46 GMT 2023
--------------------------------------------------------------
      287.91 real       111.51 user       171.26 sys
%