--- a/hgext3rd/evolve/obsdiscovery.py	Tue May 30 14:27:26 2017 +0200
+++ b/hgext3rd/evolve/obsdiscovery.py	Tue May 30 14:35:40 2017 +0200
@@ -857,6 +857,14 @@
     missing += pushop.outgoing.missing
     return missing
 
+def _pushobshashtree(pushop, commonrevs):
+    repo = pushop.repo.unfiltered()
+    remote = pushop.remote
+    node = repo.changelog.node
+    common = findcommonobsmarkers(pushop.ui, repo, remote, commonrevs)
+    revs = list(repo.revs('only(%ln, %ln)', pushop.futureheads, common))
+    return [node(r) for r in revs]
+
 @eh.wrapfunction(exchange, '_pushdiscoveryobsmarkers')
 def _pushdiscoveryobsmarkers(orig, pushop):
     if _dopushmarkers(pushop):
@@ -864,21 +872,16 @@
         obsexcmsg(repo.ui, "computing relevant nodes\n")
         revs = list(repo.revs('::%ln', pushop.futureheads))
         unfi = repo.unfiltered()
-        cl = unfi.changelog
         if not _canobshashtree(repo, pushop.remote):
             return orig(pushop)
 
-        common = []
         obsexcmsg(repo.ui, "looking for common markers in %i nodes\n"
                            % len(revs))
         commonrevs = list(unfi.revs('::%ln', pushop.outgoing.commonheads))
         if _canobshashrange(repo, pushop.remote):
             nodes = _pushobshashrange(pushop, commonrevs)
         else:
-            common = findcommonobsmarkers(pushop.ui, unfi, pushop.remote,
-                                          commonrevs)
-            revs = list(unfi.revs('only(%ln, %ln)', pushop.futureheads, common))
-            nodes = [cl.node(r) for r in revs]
+            nodes = _pushobshashtree(pushop, commonrevs)
 
         if nodes:
             obsexcmsg(repo.ui, "computing markers relevant to %i nodes\n"