zdb -b gives very long progress estimates

[Seth Arnold]

zdb -b has given me some very long progress estimates:

$ sudo zdb -b fst
[sudo] password for sarnold:

Traversing all blocks to verify nothing leaked ...

loading space map for vdev 0 of 1, metaslab 115 of 116 ...
4.72T completed (2659MB/s) estimated time remaining: 4294418971hr 4294967246min 4294967247sec

Thanks

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: zfsutils-linux 0.7.5-1ubuntu16.12
ProcVersionSignature: Ubuntu 4.15.0-154.161-generic 4.15.18
Uname: Linux 4.15.0-154-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.9-0ubuntu7.26
Architecture: amd64
Date: Mon Sep 27 18:29:14 2021
InstallationDate: Installed on 2016-04-04 (2002 days ago)
InstallationMedia: Ubuntu-Server 16.04 LTS "Xenial Xerus" - Beta amd64 (20160325)
SourcePackage: zfs-linux
UpgradeStatus: Upgraded to bionic on 2018-08-16 (1138 days ago)
modified.conffile..etc.sudoers.d.zfs: [inaccessible: [Errno 13] Permission denied: '/etc/sudoers.d/zfs']