Package: rrdtool Version: 1.4.8-1.2+deb8u1 Hi, the patch in the Jessie security update that was just released properly breaks creating graphs.
The patch contains the following line: #define FLOAT_STRING "%[+- 0#]?[0-9]*([.][0-9]+)?l[eEfF]" Now, [+- 0#] is not a valid character class for a regex, because the - defines a range, and a range from '+' to ' ' is not valid. [RRD ERROR] Unable to graph /var/lib/munin/cgi-tmp/munin-cgi-graph/[...].png : cannot compile regular expression: Error while compiling regular expression ^(?:[^%]+|%%)*%[+- 0#]?[0-9]*([.][0-9]+)?l[eEfF](?:[^%]+|%%)*%s(?:[^%]+|%%)*$ at char 18: range out of order in character class (^(?:[^%]+|%%)*%[+- 0#]?[0-9]*([.][0-9]+)?l[eEfF](?:[^%]+|%%)*%s(?:[^%]+|%%)*$) Upstream did a fixup commit, 1615689e259bfd67e43cf7711948abc23f998ca9 which you missed to include: https://github.com/oetiker/rrdtool-1.x/commit/1615689e259bfd67e43cf7711948abc23f998ca9 Thanks, Hans van Kranenburg