MySQL Bugs: #120614: LOWER() truncates trailing characters after character Ⱥ

Bug #120614	LOWER() truncates trailing characters after character Ⱥ
Submitted:	3 Jun 23:45	Modified:	4 Jun 9:27
Reporter:	Bosheng Peng	Email Updates:
Status:	Verified	Impact on me:	None
Category:	MySQL Server: Optimizer	Severity:	S3 (Non-critical)
Version:	8.0.45	OS:	Windows
Assigned to:		CPU Architecture:	Any

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Description:
Ⱥ lowercases to ⱥ. MySQL 9.5.0 stops processing the string after converting Ⱥ, discarding all subsequent characters. MariaDB, TiDB handle this correctly.

How to repeat:
```sql
SELECT LOWER('Ⱥa'), CHAR_LENGTH(LOWER('Ⱥa'));
```

Thank you for the bug report.
Verified as described.