[rrdtool-maint] Bug#891491: rrdtool: RRD Tool "Line0" is not processed any more

[Alois]

Package: rrdtool
Version: 1.6.0-1+b2
Severity: normal

Hello Maintainer,

I have updated my system from wheezy to stretch.
I had a lot munin-graphs working with "LINE0" as draw option in debian wheezy (rrdtool 1.4.7-2), all those graphs cannot be drawed any more, in debian stretch (rrdtool 1.6.0-1+b2) "Line0" generates the following error in munin-graph.log:
[RRD ERROR] Unable to graph /path/to/my/png.png : Bad line width: 0
[RRD ERROR] rrdtool 'graph' '/path/to/my/png.png'

my munin configuration did not change, as soon as I change it to "LINE1" it is drawed correct (but of course I would like to not draw the affected values .. )

Thanks for any hints what I can try or if this needs to be fixed.

BR
Alois

-- System Information:
Debian Release: 9.3
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.9.0-6-amd64 (SMP w/2 CPU cores)
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968), LANGUAGE=C (charmap=ANSI_X3.4-1968)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages rrdtool depends on:
ii  libc6         2.24-11+deb9u1
ii  libdbi1       0.9.0-4+deb9u1
ii  libglib2.0-0  2.50.3-2
ii  librrd8       1.6.0-1+b2

rrdtool recommends no packages.

Versions of packages rrdtool suggests:
ii  librrds-perl  1.6.0-1+b2

-- no debconf information