revlog.py: always return tuples from parents and parentrevs There's at least one place doing parentrevs(rev) != (rev-1, -1), which is always true with revlog v0, since parentrevs returns a list in this case.

#!/bin/sh

echo 'syntax error' > badext.py
abspath=`pwd`/badext.py

echo '[extensions]' >> $HGRCPATH
echo "badext = $abspath" >> $HGRCPATH

hg -q help help