functional.sqlancer.tidb_15844_test. NATURAL RIGHT JOIN results in an unexpected "Unknown column" error

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Full history of outcomes and elapsed time, ms:
NN SNAP_INFO CS_outcome SS_outcome CS_run_time SS_run_time CS_run_beg CS_run_end SS_run_beg SS_run_end
1 5.0.3.1674 2025.06.27 3ee5c P P 787 408 2025.06.29 13:22:33.370 2025.06.29 13:22:34.157 2025.06.29 11:53:35.734 2025.06.29 11:53:36.142
2 5.0.3.1657 2025.06.19 4bd4c P P 593 376 2025.06.27 12:34:34.393 2025.06.27 12:34:34.986 2025.06.27 11:11:53.090 2025.06.27 11:11:53.466
3 5.0.3.1657 2025.06.11 dae6f P P 663 391 2025.06.17 07:39:37.554 2025.06.17 07:39:38.217 2025.06.17 06:15:51.404 2025.06.17 06:15:51.795
4 5.0.3.1657 2025.06.10 dbc92 P P 756 472 2025.06.11 12:30:36.346 2025.06.11 12:30:37.102 2025.06.11 10:58:43.115 2025.06.11 10:58:43.587
5 5.0.3.1656 2025.05.20 c4b11 P P 647 430 2025.06.10 12:24:21.374 2025.06.10 12:24:22.021 2025.06.10 10:56:21.174 2025.06.10 10:56:21.604

Elapsed time, ms. Chart for last 5 runs:

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