t7700: demonstrate mishandling of loose objects in an alternate ODB

Loose objects residing in an alternate object database should not be packed
when the -l option to repack is used.

Signed-off-by: Brandon Casey <drafnel@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t7700-repack.sh

@@ -34,5 +34,24 @@ test_expect_success 'objects in packs marked .keep are not repacked' '
 	test -z "$found_duplicate_object"
 '
 
+test_expect_failure 'loose objects in alternate ODB are not repacked' '
+	mkdir alt_objects &&
+	echo `pwd`/alt_objects > .git/objects/info/alternates &&
+	echo content3 > file3 &&
+	objsha1=$(GIT_OBJECT_DIRECTORY=alt_objects git hash-object -w file3) &&
+	git add file3 &&
+	git commit -m commit_file3 &&
+	git repack -a -d -l &&
+	git prune-packed &&
+	for p in .git/objects/pack/*.idx; do
+		if git verify-pack -v $p | egrep "^$objsha1"; then
+			found_duplicate_object=1
+			echo "DUPLICATE OBJECT FOUND"
+			break
+		fi
+	done &&
+	test -z "$found_duplicate_object"
+'
+
 test_done