Building a 1000W BKT index crashes

[suppersam1]

Describe the bug
I crashed when building a BKT index using 1000W, 10 dimension data, and the core file shows a crash in the following code.

I tried to move the part of the shuffling algorithm out of the concurrent part, and the core phenomenon disappeared.

Desktop (please complete the following information):

• OS: Linux Ubuntu 22.04.3 LTS
• gcc Version: 11.4.0