pull-requests: fixed subrepo case for pull-requests for new mercurial.

vcsserver/hgcompat.py

@@ -36,6 +36,7 b' from mercurial import unionrepo'
 from mercurial import localrepo
 from mercurial import merge as hg_merge
 from mercurial import subrepo
+from mercurial import subrepoutil
 from mercurial import tags as hg_tag
 
 from mercurial.commands import clone, nullid, pull

vcsserver/hgpatches.py

@@ -62,7 +62,7 b' def _dynamic_capabilities_wrapper(lfprot'
 
 def patch_subrepo_type_mapping():
     from collections import defaultdict
-    from hgcompat import subrepo
+    from hgcompat import subrepo, subrepoutil
     from vcsserver.exceptions import SubrepoMergeException
 
     class NoOpSubrepo(subrepo.abstractsubrepo):
@@ -97,7 +97,7 b' def patch_subrepo_type_mapping():'
         def basestate(self):
             """current working directory base state, disregarding .hgsubstate
             state and working directory modifications"""
-            substate = subrepo.state(self._ctx, self.ui)
+            substate = subrepoutil.state(self._ctx, self.ui)
             file_system_path, rev, repotype = substate.get(self._path)
             return rev