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 2025.06.26 d366d P P 576 380 2025.06.27 05:49:17.478 2025.06.27 05:49:18.054 2025.06.27 04:44:54.816 2025.06.27 04:44:55.196
2 5.0.3.1673 2025.06.25 f0e1f P P 604 383 2025.06.26 05:55:50.242 2025.06.26 05:55:50.846 2025.06.26 04:50:33.930 2025.06.26 04:50:34.313
3 5.0.3.1668 2025.06.21 b8e22 P P 603 378 2025.06.25 10:39:32.847 2025.06.25 10:39:33.450 2025.06.25 09:34:49.725 2025.06.25 09:34:50.103
4 5.0.3.1667 2025.06.15 4374a P P 580 502 2025.06.21 05:40:00.979 2025.06.21 05:40:01.559 2025.06.21 04:33:52.233 2025.06.21 04:33:52.735
5 5.0.3.1666 2025.06.14 97178 P P 616 378 2025.06.15 06:08:22.213 2025.06.15 06:08:22.829 2025.06.15 05:02:38.944 2025.06.15 05:02:39.322
6 5.0.3.1665 2025.06.11 d8b62 P P 677 377 2025.06.14 06:06:09.370 2025.06.14 06:06:10.047 2025.06.14 05:00:21.164 2025.06.14 05:00:21.541
7 5.0.3.1661 2025.06.10 cfcf0 P P 616 379 2025.06.11 04:35:18.693 2025.06.11 04:35:19.309 2025.06.11 03:29:51.561 2025.06.11 03:29:51.940
8 5.0.3.1660 2025.06.07 db691 P P 582 381 2025.06.10 04:35:45.140 2025.06.10 04:35:45.722 2025.06.10 03:30:38.168 2025.06.10 03:30:38.549
9 5.0.3.1659 2025.05.28 f4c0f P P 576 374 2025.06.06 04:31:47.902 2025.06.06 04:31:48.478 2025.06.06 03:27:03.115 2025.06.06 03:27:03.489

Elapsed time, ms. Chart for last 9 runs:

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