The GitHub Actions job "Tests (AMD)" on 
airflow.git/trigger-rule-upstream-count-memo has failed.
Run started by GitHub user kaxil (triggered by kaxil).

Head commit for run:
e18c2810065d018bd30504702aa784082a658376 / Kaxil Naik <[email protected]>
Clear upstream-count memo when a mapped task grows via revise

_get_ready_tis already drops the trigger-rule upstream-count memo when a mapped
task expands, but not when _revise_map_indexes_if_mapped grows an 
already-expanded
task and adds new instances. A downstream evaluated later in the same pass could
then read a stale, pre-grow count. Clear the memo in that case too, and add a
regression test that drives _get_ready_tis with a fixed order so the count is
recomputed after the grow (it asserts the query runs twice; fails without the 
clear).

Report URL: https://github.com/apache/airflow/actions/runs/27230963360

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