[#MDEV-25384] Overlays for the main MTR suite do not work anymore

10.3 450c017c
$ perl ./mtr main-test_sql_discovery.create
Logging: ./mtr main-test_sql_discovery.create
vardir: /mnt-hd8t/bld/10.3-debug-nightly/mysql-test/var
Removing old var directory...
Creating var directory '/mnt-hd8t/bld/10.3-debug-nightly/mysql-test/var'...
Checking supported features...
MariaDB Version 10.3.29-MariaDB-debug
- SSL connections supported
- binaries are debug compiled
- binaries built with wsrep patch
Collecting tests...
mysql-test-run: *** ERROR: Could not find 'create' in 'main-test_sql_discovery' suite

The change was introduced by renaming the main MTR suite folder from t to main:

commit a7abddeffa6a760ce948c2dfb007cdf3f1a369d5

Author: Michael Widenius

Date:   Fri Mar 9 14:05:35 2018 +0200

    Create 'main' test directory and move 't' and 'r' there

[MDEV-25384] Overlays for the main MTR suite do not work anymore Created: 2021-04-11 Updated: 2023-04-27
Status:	Open
Project:	MariaDB Server
Component/s:	Tests
Affects Version/s:	10.3, 10.4, 10.5, 10.6
Fix Version/s:	10.4, 10.5