Munin: not a reference at /usr/share/perl5/Munin/Master/Utils.pm line 901

[Keith Edmunds <kae@midnighthax.com>]

I'm seeing this error:

	not a reference at /usr/share/perl5/Munin/Master/Utils.pm line 901

...being reported intermittently by a number of systems running Munin:

$ dpkg -l|grep munin|awk '{print $2" "$3}'
munin 2.0.0-1~bpo60+1
munin-common 2.0.0-1~bpo60+1
munin-doc 2.0.0-1~bpo60+1
munin-node 2.0.0-1~bpo60+1
munin-plugins-core 2.0.0-1~bpo60+1
munin-plugins-extra 2.0.0-1~bpo60+1

What should I do to help get this resolved?
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