cmdutil.bailifchanged: abort for dirty subrepos

mercurial/cmdutil.py

@@ -75,6 +75,10 b' def bailifchanged(repo):'
     modified, added, removed, deleted = repo.status()[:4]
     if modified or added or removed or deleted:
         raise util.Abort(_("outstanding uncommitted changes"))
+    ctx = repo[None]
+    for s in ctx.substate:
+        if ctx.sub(s).dirty():
+            raise util.Abort(_("uncommitted changes in subrepo %s") % s)
 
 def logmessage(ui, opts):
     """ get the log message according to -m and -l option """

tests/test-subrepo.t

@@ -52,6 +52,14 b' Issue2022: update -C'
   commit: (clean)
   update: (current)
 
+commands that require a clean repo should respect subrepos
+
+  $ echo b >> s/a
+  $ hg backout tip
+  abort: uncommitted changes in subrepo s
+  [255]
+  $ hg revert -C -R s s/a
+
 add sub sub
 
   $ echo ss = ss > s/.hgsub