py3: make 'None in lazyancestors' not crash
This looks somewhat weird, but we have callers like 'torev(n) in futurecommon'
around where torev(n) is dictlike.get(n). I could fix callers, but that would
be unnecessarily verbose.
--- a/mercurial/ancestor.py Sun Jul 08 16:55:21 2018 +0900
+++ b/mercurial/ancestor.py Sun Jul 08 17:17:54 2018 +0900
@@ -339,6 +339,10 @@
seen = self._containsseen
if target in seen:
return True
+ # Only integer target is valid, but some callers expect 'None in self'
+ # to be False. So we explicitly allow it.
+ if target is None:
+ return False
parentrevs = self._parentrevs
visit = self._containsvisit