diff -r 821d8a5ab4ff -r 73f51bdb0fea mercurial/subrepo.py
--- a/mercurial/subrepo.py	Tue Jan 16 22:14:33 2018 +0900
+++ b/mercurial/subrepo.py	Sun Jan 14 12:05:28 2018 -0500
@@ -1327,6 +1327,7 @@
                     return True, True, bool(missing)
         return bool(changes), False, bool(missing)
 
+    @annotatesubrepoerror
     def dirty(self, ignoreupdate=False, missing=False):
         wcchanged = self._wcchanged()
         changed = wcchanged[0] or (missing and wcchanged[2])