It looks like this is in update-initramfs:
255 for gsv_i in $version_list; do 256 if dpkg --compare-versions "${gsv_x}" '>' "${gsv_i}"; then 257 worklist="${worklist} ${gsv_x} ${gsv_i}" 258 gsv_x="" 259 else 260 worklist="${worklist} ${gsv_i}"
It looks like this is in update-initramfs:
255 for gsv_i in $version_list; do "${worklist} ${gsv_x} ${gsv_i}" "${worklist} ${gsv_i}"
256 if dpkg --compare-versions "${gsv_x}" '>' "${gsv_i}"; then
257 worklist=
258 gsv_x=""
259 else
260 worklist=