--- a/hgext/evolve.py	Wed Aug 06 18:06:17 2014 -0700
+++ b/hgext/evolve.py	Wed Aug 06 17:14:00 2014 -0700
@@ -1935,7 +1935,7 @@
     Return 0 if changed files are uncommitted.
     """
 
-    wlock = lock = None
+    wlock = lock = tr = None
     try:
         wlock = repo.wlock()
         lock = repo.lock()
@@ -1951,7 +1951,9 @@
             raise util.Abort(_("cannot uncommit merge changeset"))
         oldphase = old.phase()
         updatebookmarks = _bookmarksupdater(repo, old.node())
+
         # Recommit the filtered changeset
+        tr = repo.transaction('uncommit')
         newid = None
         if (pats or opts.get('include') or opts.get('exclude')
             or opts.get('all')):
@@ -1969,8 +1971,9 @@
         if not repo[newid].files():
             ui.warn(_("new changeset is empty\n"))
             ui.status(_('(use "hg prune ." to remove it)\n'))
+        tr.close()
     finally:
-        lockmod.release(lock, wlock)
+        lockmod.release(tr, lock, wlock)
 
 @eh.wrapcommand('commit')
 def commitwrapper(orig, ui, repo, *arg, **kwargs):