Merge
diff --git a/.hgtags b/.hgtags
index 5a5e167..6f8633b 100644
--- a/.hgtags
+++ b/.hgtags
@@ -260,3 +260,4 @@
 4537360f09fe23ab339ee588747b657feb12d0c8 jdk9-b15
 ab7d2c565b0de5bee1361d282d4029371327fc9e jdk9-b16
 fd8e675f141b9bdb2f46d1ae8251f4ee3a895d64 jdk9-b17
+6ad17b31f0d30593392b1e8695b9709dbbd7fb70 jdk9-b18