diff -r 000000000000 -r 959103a6100f test/tools/doclint/CustomTagTestWithOption.out
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/tools/doclint/CustomTagTestWithOption.out	Wed Apr 27 01:34:52 2016 +0800
@@ -0,0 +1,5 @@
+CustomTagTest.java:16: error: unknown tag: unknownTag
+ * @unknownTag Text for an unknown tag.
+   ^
+1 error
+