diff -r 6c5a6c2706f6 -r a94ce5400e1b hgext/evolve.py
--- a/hgext/evolve.py	Wed Apr 23 14:24:02 2014 -0700
+++ b/hgext/evolve.py	Fri Apr 25 19:58:33 2014 -0500
@@ -753,7 +753,10 @@
         destbookmarks = repo.nodebookmarks(dest.node())
         nodesrc = orig.node()
         destphase = repo[nodesrc].phase()
+        wlock = lock = None
         try:
+            wlock = repo.wlock()
+            lock = repo.lock()
             r = rebase.rebasenode(repo, orig.node(), dest.node(),
                                   {node.nullrev: node.nullrev}, False)
             if r[-1]: #some conflict
@@ -767,6 +770,8 @@
                 pass
             exc.__class__ = LocalMergeFailure
             raise
+        finally:
+            lockmod.release(lock, wlock)
         oldbookmarks = repo.nodebookmarks(nodesrc)
         if nodenew is not None:
             phases.retractboundary(repo, destphase, [nodenew])