While in minibuffer, Ctrl-a to move cursor to beginning of line, returns Search failed

[dmerz75]

When I run compile command:
M-x compile
cursor is in the mini-buffer:
Compile command: make -k
I enter Ctrl-a command to move the cursor to the first space in the mini-buffer, and enter a new compile command, I get a Search failed error message:
Search failed: "^[[:space:]]*"
before being allowed to continue... from the Messages buffer, it gives this output:
let: Search failed: "^[[:space:]]*"
apply: Command attempted to use minibuffer while in minibuffer
let: Search failed: "^[[:space:]]*"
Quit

Has anyone seen this error message when using (Ctrl-a) in the mini-buffer?
It occurs in my emacs with prelude with/without personal directory customization.
Emacs-version: 25.2.1

C-a runs the command crux-move-beginning-of-line (found in
prelude-mode-map), which is an interactive Lisp closure in ‘crux.el’.
It is bound to C-a.
(crux-move-beginning-of-line ARG)

[knilink]

bbatsov/crux#46

[dmerz75]

Thanks knilink!