12-stable buildworld appears to be broken

[tech-lists]

Hi,

My context is poudriere creating jails on freebsd12-stable. This procedure 
worked fine for some other jails I created a couple days ago (the 5th) 
but now, today I get buildworld failures with creating either amd64 or 
armv7 jails (the server is amd64)

To try to see the failure, I set jobs to J1 like so:

poudriere jail -x -J1 -c -j 12armv7 -a arm.armv7 -m svn+https -v
stable/12

It bails when it's making rescue with this error:

/data/poudriere/basefs/jails/12armv7/usr/src/sbin/fsck_ffs/pass1.c:454:13:
error: too many arguments to function call, expected 0, have 1
                        inodirty(dp);
                        ~~~~~~~~ ^~
/data/poudriere/basefs/jails/12armv7/usr/src/sbin/fsck_ffs/fsck.h:453:1:
note: 'inodirty' declared here
void inodirty(void); ^
1 error generated.
*** [pass1.o] Error code 1

I know that's probably not enough, so have pasted much more output at
https://rpi3.zyxst.net/errors/poudriere-build-failure.txt

not tried make buildworld yet on the host. The OS is at r344763 and
/usr/src is at 344863

Just tried it on another 12-stable desktop, straightforward make
buildworld, same sort of error:

--- all_subdir_sbin/fsdb ---
/usr/src/sbin/fsdb/fsdb.c:1042:14: error: too many arguments to function
call, expected 0, have 1
    inodirty(curinode);
        ~~~~~~~~ ^~~~~~~~  
        /usr/src/sbin/fsck_ffs/fsck.h:453:1: note: 'inodirty' declared
        here
        void            inodirty(void);

the sources are at 344869

thanks,
-- 
J.