Index out of range in tidb randgen #56825
Description
Bug Report
Please answer these questions before submitting your issue. Thanks!
https://tcms.pingcap.net/dashboard/executions/plan/7640997
This test shows an error.
1. Minimal reproduce step (Required)
2. What did you expect to see? (Required)
no error
3. What did you see instead (Required)
runtime error: index out of range [7] with length 7
4. What is your TiDB version? (Required)
nightly: ed9a909