decodeIndexKvForClusteredIndexVersion1 function cause strings: negative Repeat count

[dua01]

Bug Report

1. Minimal reproduce step (Required)

create table t (a int, b int, k varchar(64), primary key (a, b), key k (k));
insert value which k is end of over 127 spaces.
OR
table/tables/index_test.go:66 Add 128 spaces behind abc and run test

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

Test Pass

3. What did you see instead (Required)

panic: strings: negative Repeat count

4. What is your TiDB version? (Required)

Tidb 5.0+

[jebter]

/sig executor
/severity major

[ti-chi-bot]

@jebter: The label(s) sig/executor cannot be applied, because the repository doesn't have them.

In response to this:

/sig executor
/severity major

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the ti-community-infra/tichi repository.

[jebter]

/sig executor

[ti-chi-bot]

@jebter: The label(s) sig/executor cannot be applied, because the repository doesn't have them.

In response to this:

/sig executor

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the ti-community-infra/tichi repository.

[jebter]

/sig execution

[zanmato1984]

Transfer to sig/transaction.