perl6-debug-m spawning moar till system thrashes

Question

I installed perl6 on Ubuntu with rakudobrew and then Debugger::UI::CommandLine with panda but I can't debug because there is no perl6-debug command -- only a perl6-debug-m command which, when I invoke it on a rather simple script, brings the system to its knees by spawning a huge number of moar tasks. Any suggestions?

Here's my configuration:

$ rakudobrew current
Currently running moar-2015.12
$ which rakudobrew 
/home/jabowery/.rakudobrew/bin/rakudobrew
$ which perl6
/home/jabowery/.rakudobrew/bin/perl6
$ which panda
/home/jabowery/.rakudobrew/bin/panda
$ which perl6-debug-m
/home/jabowery/.rakudobrew/bin/perl6-debug-m
$ perl6 -v
This is Rakudo version 2015.12 built on MoarVM version 2015.12
implementing Perl 6.c.
$ lsb_release -a
LSB Version:    core-9.20160110ubuntu0.2-amd64:core-9.20160110ubuntu0.2-noarch:security-9.20160110ubuntu0.2-amd64:security-9.20160110ubuntu0.2-noarch
Distributor ID: Ubuntu
Description:    Ubuntu 16.04.1 LTS
Release:    16.04
Codename:   xenial

Answer 1

I was able to resolve this by using rakudobrew nuke and apt purge rakudo and then reinstalling rakudobrew after rm -rf ~/.rakudobrew. Reinstalling perl6, panda and Debugger::UI::CommandLine led to a working debugger.

Apparently something was wrong with the original installation.