Track to_primitive() depth after iteritems().

Change jsonutils.to_primitive() to increase the recursion depth counter
when calling to_primitive() on the result of iteritems() from the
current element.  Previously, the only time the counter was increased
was when converting the __dict__ from an object.  The iteritems() case
risks cycles, as well.

I hit a problem with this when trying to call to_primitive on an
instance of nova.db.sqlalchemy.models.Instance.  An Instance includes a
reference to InstanceInfoCache, which has a reference back to the
Instance.  Without this change, to_primitive() would raise an exception
for an Instance due to excessive recursion.

Related to nova blueprint no-db-messaging.

Change-Id: Ifb878368d97e92ab6c361a4dd5f5ab2e68fc16e2

0 files changed, 0 insertions, 0 deletions