Mojave migration

[Ken G. Brown]

Following https://trac.macports.org/wiki/Migration

Got to sudo ./restore_ports.tcl myports.txt
then:
> sudo ./restore_ports.tcl myports.txt
> Error: we appear to be stuck, exiting...
> infinite loop
>     while executing
> "sort_ports $portList"
>     invoked from within
> "set operationList [sort_ports $portList]"
>     (file "./restore_ports.tcl" line 285)

macOS 10.14.2 Beta (18C38b)

What should I do next?
Thx for any tips.
Ken G. Brown