Syncing a link with props with which is initialized to None produces AssertionError

[dnwpark]

Given a schema:

type Target;
type SourceWithProp {
    target: Target {
        lprop: int64;
    };
};

the following code:

with_none = default.SourceWithProp(target=None)
self.client.sync(with_none)

produces an AssertionError:

File ".../edgedb-python/gel/_internal/_save.py", line 1105, in make_save_executor_constructor
) = make_plan(
    ^^^^^^^^^^
File ".../edgedb-python/gel/_internal/_save.py", line 737, in make_plan
assert isinstance(val, ProxyModel)
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^

See

• Add tests for syncing objects with links #881 test test_model_sync_single_link_01a
• Refetch computed for newly inserted objects #869 test test_model_sync_single_link_02c