Speaking about the 0.91-11 package as found in the official Ubuntu archive: this seems to be caused by dh_scour being running during the build, apparently scour tries to optimaze the .svg, but fails shortly on it do to the particular nature of those particular .svg (containing only markers/defines, but nothing that uses them).
The best fix here is to just stop calling dh_scour at all, there is no need for it anyway, and calling it never was intentional at all.
Speaking about the 0.91-11 package as found in the official Ubuntu archive: this seems to be caused by dh_scour being running during the build, apparently scour tries to optimaze the .svg, but fails shortly on it do to the particular nature of those particular .svg (containing only markers/defines, but nothing that uses them).
The best fix here is to just stop calling dh_scour at all, there is no need for it anyway, and calling it never was intentional at all.