D274: obsutil: defend against succsmarkers() returning None

[durin42 (Augie Fackler)]

durin42 created this revision.
Herald added a subscriber: mercurial-devel.
Herald added a reviewer: hg-reviewers.

REVISION SUMMARY
  I'm not sure if this is a realistic problem, but doing this avoids
  some pretty awful test failures on Python 3, and it looks like it
  should be harmless.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D274

AFFECTED FILES
  mercurial/obsutil.py

CHANGE DETAILS

diff --git a/mercurial/obsutil.py b/mercurial/obsutil.py
--- a/mercurial/obsutil.py
+++ b/mercurial/obsutil.py
@@ -307,7 +307,7 @@
         seenrevs.add(rev)
         if phase(repo, rev) == public:
             continue
-        if set(succsmarkers(node)).issubset(addedmarkers):
+        if set(succsmarkers(node) or []).issubset(addedmarkers):
             obsoleted.add(rev)
     return obsoleted
 



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