diff -r f157ef7b1741 -r 2f117c299325 hgext/evolve.py
--- a/hgext/evolve.py	Tue Jan 26 15:42:01 2016 -0800
+++ b/hgext/evolve.py	Sat Jan 23 06:18:01 2016 +0900
@@ -946,7 +946,8 @@
             repo.ui.note(_('The stale commit message reference to %s could '
                            'not be updated\n') % sha1)
 
-    tr = repo.transaction('relocate')
+    tr = repo.currenttransaction()
+    assert tr is not None
     try:
         try:
             r = _evolvemerge(repo, orig, dest, pctx, keepbranch)
@@ -967,9 +968,8 @@
             raise
         oldbookmarks = repo.nodebookmarks(nodesrc)
         _finalizerelocate(repo, orig, dest, nodenew, tr)
-        tr.close()
     finally:
-        tr.release()
+        pass # TODO: remove this redundant try/finally block
     return nodenew
 
 def _bookmarksupdater(repo, oldid, tr):
@@ -1839,7 +1839,8 @@
     newid = tmpctx = None
     tmpctx = bumped
     # Basic check for common parent. Far too complicated and fragile
-    tr = repo.transaction('bumped-stabilize')
+    tr = repo.currenttransaction()
+    assert tr is not None
     bmupdate = _bookmarksupdater(repo, bumped.node(), tr)
     try:
         if not list(repo.set('parents(%d) and parents(%d)', bumped, prec)):
@@ -1905,10 +1906,9 @@
             obsolete.createmarkers(repo, [(tmpctx, (repo[newid],))],
                                    flag=obsolete.bumpedfix)
         bmupdate(newid)
-        tr.close()
         repo.ui.status(_('committed as %s\n') % node.short(newid))
     finally:
-        tr.release()
+        pass # TODO: remove this redundant try/finally block
     # reroute the working copy parent to the new changeset
     repo.dirstate.beginparentchange()
     repo.dirstate.setparents(newid, node.nullid)
@@ -2017,7 +2017,8 @@
 """)
     if progresscb: progresscb()
     emtpycommitallowed = repo.ui.backupconfig('ui', 'allowemptycommit')
-    tr = repo.transaction('stabilize-divergent')
+    tr = repo.currenttransaction()
+    assert tr is not None
     try:
         repo.ui.setconfig('ui', 'allowemptycommit', True)
         repo.dirstate.beginparentchange()
@@ -2032,10 +2033,8 @@
             new = repo['.']
         obsolete.createmarkers(repo, [(other, (new,))])
         phases.retractboundary(repo, tr, other.phase(), [new.node()])
-        tr.close()
     finally:
         repo.ui.restoreconfig(emtpycommitallowed)
-        tr.release()
 
 def divergentdata(ctx):
     """return base, other part of a conflict