kaxil commented on PR #67356:
URL: https://github.com/apache/airflow/pull/67356#issuecomment-5942939206
Closing this. Overriding a `DictOfListsExpandInput` argument with
`[new_param] * (args.map_index + 1)` changes the length of that one list, and
with it the cross product of all expanded arguments, so the other arguments
resolve to the wrong values: with `expand(a=[1, 2, 3], b=[10, 20, 30])`,
`--map-index 4` and `--task-params '{"b": 99}'`, the task gets `a=1` instead of
`a=2`, as reported in review in July. The tests only cover single-argument
expansion. It also makes `--task-params`, which sends params to the task,
override expand arguments.
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