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

[Christian Schrötter]

Control: found munin/2.0.33-1
Control: found 1.6.0-1+b2

Any updates? :-)

I've upgraded my Munin VM from Jessie to Stretch and all LINE0 graphs
are broken now. I think I've found the relevant change in the sources:

https://github.com/oetiker/rrdtool-1.x/blame/59d21dcdbd2eeb9781b690628415273e6c150c69/src/rrd_graph_helper.c#L547-L550