make sure to collect all output of all changed files in one go in 00-uid-gid-fix.chroot_early, that way we only need to fix it once and have all info in the logs

debian/changelog

@@ -1,10 +1,16 @@
 livecd-rootfs (2.283) UNRELEASED; urgency=low
 
+  [ Michael Vogt ]
   * add more verbose output to
     live-build/ubuntu-core/hooks/00-uid-gid-fix.chroot_early
     (thanks Oliver!)
 
- -- Michael Vogt <michael.vogt@ubuntu.com>  Wed, 11 Feb 2015 17:43:43 +0100
+  [ Oliver Grawert ]
+  * make sure to collect all output of all changed files in one go in
+    00-uid-gid-fix.chroot_early, that way we only need to fix it once and have
+    all info in the logs
+
+ -- Oliver Grawert <ogra@ubuntu.com>  Wed, 11 Feb 2015 18:25:11 +0100
 
 livecd-rootfs (2.282) vivid; urgency=medium
 

live-build/ubuntu-touch/hooks/00-uid-gid-fix.chroot_early

@@ -1,9 +1,11 @@
 #!/bin/sh -eu
 
+ERRCNT=""
+
 # Known good post-debootstrap values
 passwd_bootstrap="5e8366ef9c178b62079468966f38ce5f"
 shadow_bootstrap="1c562aa2ed2f443b9151953e800eca16"
-group_bootstrap="60cd81599d39db5d624e63c8c18d4a5e"
+group_bootstrap="11709d548918f428231ce5801f6da521"
 gshadow_bootstrap="3819432fb99fe6b8f38410c58d503de1"
 
 # Current post-debootstrap values
@@ -56,7 +58,7 @@ else
     echo "The output below might help to resolve the issue" >&2
     cat /etc/passwd
     echo "passwd md5sum: $passwd_hash" >&2
-    exit 1
+    ERRCNT=1
 fi
 
 # /etc/shadow
@@ -103,7 +105,7 @@ else
     echo "The output below might help to resolve the issue" >&2
     cat /etc/shadow
     echo "shadow md5sum: $shadow_hash" >&2
-    exit 1
+    ERRCNT=1
 fi
 
 # /etc/group
@@ -188,7 +190,7 @@ else
     echo "The output below might help to resolve the issue" >&2
     cat /etc/group
     echo "group md5sum: $group_hash" >&2
-    exit 1
+    ERRCNT=1
 fi
 
 # /etc/gshadow
@@ -273,9 +275,19 @@ else
     echo "The output below might help to resolve the issue" >&2
     cat /etc/gshadow
     echo "gshadow md5sum: $gshadow_hash" >&2
-    exit 1
+    ERRCNT=1
 fi
 
+if [ -n "$ERRCNT" ]; then
+        echo "There were changes to the password database," >&2
+        echo "please adjust the values in the livecd-rootfs source in the file:" >&2
+        echo "live-build/ubuntu-core/hooks/00-uid-gid-fix.chroot_early" >&2
+        echo >&2
+        echo "Please check also if a maintainer script of the package" >&2
+        echo "that added these entries perhaps created a home directory and," >&2
+        echo "if needed, add code for creation of it to the above hook" >&2
+        exit 1
+fi
 
 # Create some missing directories
 mkdir -p /var/lib/lightdm