--- a/CHANGELOG	Fri Jan 18 23:09:44 2019 +0530
+++ b/CHANGELOG	Thu Jan 17 12:37:40 2019 +0100
@@ -17,6 +17,7 @@
   * next: evolve aspiring children by default (use --no-evolve to skip)
   * next: pick lower part of a split as destination
   * compat: drop compatibility with Mercurial 4.3
+  * compat: add compatibility with Mercurial 4.9
   * topics: improve the message around topic changing
   * stack: introduce a --children flag (see help for details)
   * topic: make --age compatible with the usual other display for `hg topic`

--- a/hgext3rd/evolve/metadata.py	Fri Jan 18 23:09:44 2019 +0530
+++ b/hgext3rd/evolve/metadata.py	Thu Jan 17 12:37:40 2019 +0100
@@ -6,6 +6,6 @@
 # GNU General Public License version 2 or any later version.
 
 __version__ = '8.4.0.dev'
-testedwith = '4.4.2 4.5.2 4.6.2 4.7 4.8'
+testedwith = '4.4.2 4.5.2 4.6.2 4.7 4.8 4.9'
 minimumhgversion = '4.4'
 buglink = 'https://bz.mercurial-scm.org/'

--- a/hgext3rd/evolve/obsdiscovery.py	Fri Jan 18 23:09:44 2019 +0530
+++ b/hgext3rd/evolve/obsdiscovery.py	Thu Jan 17 12:37:40 2019 +0100
@@ -1088,12 +1088,12 @@
     if bundle2 and _canobshashrange(repo, remote):
         obsexcmsg(repo.ui, "looking for common markers in %i nodes\n"
                   % len(revs))
-        boundaries['missing'] = findmissingrange(repo.ui, repo, pullop.remote,
+        boundaries['missing'] = findmissingrange(repo.ui, unfi, pullop.remote,
                                                  revs)
     elif remote.capable('_evoext_obshash_0'):
         obsexcmsg(repo.ui, "looking for common markers in %i nodes\n"
                            % len(revs))
-        boundaries['common'] = findcommonobsmarkers(repo.ui, repo, remote, revs)
+        boundaries['common'] = findcommonobsmarkers(repo.ui, unfi, remote, revs)
     else:
         boundaries['common'] = [node.nullid]
     return boundaries