Run "snap debug validate-seed" to do basic validation of the geerated seed.yaml

debian/control

@@ -34,7 +34,7 @@ Depends: ${misc:Depends},
          python3-yaml,
          qemu-utils,
          rsync,
-         snapd,
+         snapd (>= 2.39),
          squashfs-tools (>= 1:3.3-1),
          sudo,
          u-boot-tools [armhf arm64],

live-build/auto/build

@@ -529,6 +529,11 @@ if [ -z "$PASSES" ] && [ -e "$PREFIX.manifest" ]; then
 	./config/snap-seed-parse "chroot/" "$PREFIX.manifest"
 fi
 
+# Do basic validation of generated snapd seed.yaml.
+if [ -e chroot/var/lib/snapd/seed/seed.yaml ]; then
+    snap debug validate-seed chroot/var/lib/snapd/seed/seed.yaml
+fi
+
 # ubuntu-core splits kernel stuff into a "device" tarball so
 # at this point we reset it to "none" as all the work to extract it was done already
 # in a binary hook