diff --git a/.hgtags b/.hgtags
--- a/.hgtags
+++ b/.hgtags
@@ -225,3 +225,4 @@ f67b8946bb1b6cfa8328dbf8d6a9128b69ccdcb4
 8d2b62d716b095507effaa8d56f87cd27ba659ab 5.8rc1
 067f2c53fb24506c9e9fb4639871b13b19a85f8a 5.8
 411dc27fd9fd076d6a031a08fcaace659afe2fe3 5.8.1
+d7515d29761d5ada7d9c765f517db67db75dea9a 5.9rc0