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model.base: fix ConstrainedList.clear() atomicity #153

Commits on Nov 4, 2023

  1. model.base: fix ConstrainedList.clear() atomicity

    The default inherited `clear()` implementation repeatedly deletes the
    last item of the list until the list is empty. If the last item can be
    deleted successfully, but an item in front of it that will be deleted
    later cannot, this makes `clear()` non-atomic.
    
    Thus, the `clear()` method is now overriden in an atomic way.
    Furthermore, the ConstrainedList atomicity test is fixed to correctly
    test for this as well.
    jkhsjdhjs committed Nov 4, 2023
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