There is a new pull request by leahneukirchen against master on the void-packages repository

https://github.com/leahneukirchen/void-packages bash51
https://github.com/void-linux/void-packages/pull/27083

Bash 5.1 and Readline 8.1


A patch file from https://github.com/void-linux/void-packages/pull/27083.patch is attached