diff -r b0153cb8b64e -r f042d4b263f4 mercurial/localrepo.py
--- a/mercurial/localrepo.py	Thu Mar 13 19:48:41 2014 +0900
+++ b/mercurial/localrepo.py	Wed Mar 19 01:07:41 2014 +0900
@@ -1270,6 +1270,11 @@
                 cctx._text = editor(self, cctx, subs)
             edited = (text != cctx._text)
 
+            # Save commit message in case this transaction gets rolled back
+            # (e.g. by a pretxncommit hook).  Leave the content alone on
+            # the assumption that the user will use the same editor again.
+            msgfn = self.savecommitmessage(cctx._text)
+
             # commit subs and write new state
             if subs:
                 for s in sorted(commitsubs):
@@ -1280,11 +1285,6 @@
                     newstate[s] = (newstate[s][0], sr)
                 subrepo.writestate(self, newstate)
 
-            # Save commit message in case this transaction gets rolled back
-            # (e.g. by a pretxncommit hook).  Leave the content alone on
-            # the assumption that the user will use the same editor again.
-            msgfn = self.savecommitmessage(cctx._text)
-
             p1, p2 = self.dirstate.parents()
             hookp1, hookp2 = hex(p1), (p2 != nullid and hex(p2) or '')
             try: