[FATAL] [lib.rs:478] ["range end index 4 out of range for slice of length 3"]

[sayJason]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

CREATE TABLE t1 (c1 bit(24));
INSERT IGNORE t1 (c1) VALUES (b'100011111100001110010100001000000101000011011100000011010001110');
SELECT c1 FROM t1 WHERE FALSE NOT LIKE CONVERT(c1, CHAR);

2. What did you expect to see? (Required)

Execute without crash

3. What did you see instead (Required)

Crash down the server

4. What is your TiDB version? (Required)

Release Version: v8.3.0
Edition: Community
Git Commit Hash: 1a0c3ac
Git Branch: HEAD
UTC Build Time: 2024-08-20 10:13:01
GoVersion: go1.21.10
Race Enabled: false
Check Table Before Drop: false
Store: tikv

[windtalker]

The root cause is the collation of like function is derived to be utf8mb4_general_ci, which is not expected. Since the collation of cast(bit as char) should be binary, and the collation of like should be binary.