Imported 23.10.27 from mantic-release pocket.

No reason for CPC update specified.

debian/changelog

@@ -1,3 +1,12 @@
+livecd-rootfs (23.10.27) mantic; urgency=medium
+
+  * Add ubuntu to the list of targets we autopkgtest for on amd64, to ensure
+    coverage of the lb_chroot_layered behavior.
+  * lb_chroot_layered: if the unmount of the chroot mountpoint fails, dump
+    mount information for debugging.
+
+ -- Steve Langasek <steve.langasek@ubuntu.com>  Tue, 29 Aug 2023 10:39:23 -0700
+
 livecd-rootfs (23.10.26) mantic; urgency=medium
 
   [ Łukasz 'sil2100' Zemczak ]

debian/tests/default-bootstraps

@@ -43,11 +43,17 @@ ALL_TRIPLETS="
  xubuntu::
  xubuntu:minimal:"
 
+ARCH=$(dpkg --print-architecture)
+
 if [ -z "$SELECTED_TRIPLETS" ]; then
     SELECTED_TRIPLETS="
  ubuntu-base::
  ubuntu-cpc::ubuntu-cpc
 "
+    if [ "$ARCH" = amd64 ]; then
+        SELECTED_TRIPLETS="$SELECTED_TRIPLETS
+ubuntu::"
+    fi
 fi
 
 live_build_rootfs() {
@@ -55,7 +61,6 @@ live_build_rootfs() {
     local SUBPROJECT_TMP=${1%:*}
     SUBPROJECT=${SUBPROJECT_TMP#*:}
     TEMPLATE=${1##*:}
-    ARCH=$(dpkg --print-architecture)
     echo "Building rootfs for project: '$PROJECT' subproject: '$SUBPROJECT' template: '$TEMPLATE' in $PWD"
     cp -a /usr/share/livecd-rootfs/live-build/auto .
     if [ -n "$TEMPLATE" ]; then

live-build/lb_chroot_layered

@@ -268,7 +268,13 @@ create_chroot_pass () {
 	lb chroot_devpts remove ${*}
 
 	if [ -n "$lowerdirs" ]; then
-		umount chroot
+		res=0
+		umount chroot || res=$?
+		if [ $res -ne 0 ]; then
+			Echo_message "Unmount failed, current mounts: "
+			cat /proc/$$/mounts
+			exit $res
+		fi
 		rmdir chroot
 	else
 		rm chroot