1073741824 bytes transferred in 1.711094 secs (627517698 bytes/sec)
You may have to run 'hammer prune-everything' and 'hammer reblock'
quite often, even if using a nohistory mount.
[!]   -> write lands in adjacent kernel heap / unmapped page
[!]   -> idx*8 = 255 MiB past volume_map -> guaranteed fatal page fault
[+] vol_no patched in-place (CRC left as-is -- not validated at mount)
[*] BASELINE MOUNT on #0 (expect panic):