Initially this didn't help at all, but with some tweaks it now finds the leaked ChartModel as the #3 and #4 printed stacks, with a very bad score of 40.
a4e219e add bin/refcount_leak.py script to help detect leaks of UNO objects
bin/refcount_leak.py | 179 ++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 179 insertions(+)
Upstream: cgit.freedesktop.org