paccache: exit in case of pacman error when -u flag is used

Fixes https://bugs.archlinux.org/task/43286

Signed-off-by: Dario Giovannetti <dariogiova@gmail.com>
Signed-off-by: Allan McRae <allan@archlinux.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/contrib/paccache.sh.in b/contrib/paccache.sh.in
index 6a68d4de..1690583e 100644
--- a/contrib/paccache.sh.in
+++ b/contrib/paccache.sh.in
@@ -256,6 +256,8 @@ while :; do
 			delete=1 ;;
 		-u|--uninstalled)
 			IFS=$'\n' read -r -d '' -a ign < <(pacman -Qq)
+			# pacman -Qq may exit with an error, thus making ign an empty array
+			(( ${#ign[@]} )) || die 'failed to retrieve the list of installed packages'
 			blacklist+=("${ign[@]}")
 			unset ign ;;
 		-V|--version)