dictsort is not stable sort

[eronen]

I'm trying to sort a list first by owner, then by date, like this:

{% for item in items|dictsort:"date"|dictsort:"owner" %}

Python's sort method is stable (preserves the order if the sort key is the same), so I assumed dictsort would be, too.
But it's not!

Ticket #11008 has a patch which fixes this problem, too (although #11008 is not
about sort stability as such).

[Russell Keith-Magee]

Duplicate of #11008 (if you interpret that ticket as "dictsort is broken")