=== make nativekernel KERNCONF=X86_64_GENERIC (with fix.diff applied to guest /usr/src) ===
kernel build: NK_RC=0 (kernel.stripped 15705808 bytes, kernel.debug 119341120 bytes)
make installkernel: IK_RC=0
booted: DragonFly 6.5-DEVELOPMENT #1: Sat Sep  5 07:16:55 UTC 2026

=== fix run (depth 200) ===
version=7 buf_beg=557056 buf_end=12884901888 orig_root=8000000021000000 (raw 554205184)
orig root: type=L count=11
last btree node @ 554205184 (0x21088000)
btree blockmap next_offset=8000000021001000 (raw 554209280)
FORGED depth=200 tid=4000000000000000 r2=8000000021001000 (raw 554209280) leaf=80000000210ca000 (raw 555032576) vhdr_copies=1
PLACE_RAW_MIN=554209280 PLACE_RAW_MAX=555036672
MOUNT_OK depth=200
d
f
SNAPRM_RETURNED rc=0 (recursion unwound without overflow)
RUN_COMPLETE depth=200
SCRIPT_RC=0