> I've not been able to easily reproduce this problem. > How did you proceed?
Not very reproducible, but I found it could be encouraged to happen
(on a sacrificial secondary fossil+venti) with this:
tar c /n/xfossil/sys/src >/dev/null &
while (sleep 60) echo snap -a >>/srv/xfscons
An easily recognisable consequence when it fails is a BtDir block with
invalid contents. So I peppered the source with diagnostics checking
for that, until I was able to spot exactly where it happened.
