savehist-minibuffer-history-variables

savehist-minibuffer-history-variables is a variable defined in `savehist.el'.
Its value is

nil

Documentation:
List of minibuffer histories.
The contents of this variable is built while Emacs is running, and saved
along with minibuffer history. You can change its value off
`savehist-save-hook' to influence which variables are saved.