Variable: compilation-arrow-overlay
compilation-arrow-overlay is a buffer-local variable defined in
compile.el.gz.
Documentation
Overlay with the before-string property of overlay-arrow-string.
When non-nil, this overlay causes redisplay to display overlay-arrow-string
at the overlay's start position.
Source Code
;; Defined in /usr/src/emacs/lisp/progmodes/compile.el.gz
(defvar-local compilation-arrow-overlay nil
"Overlay with the before-string property of `overlay-arrow-string'.
When non-nil, this overlay causes redisplay to display `overlay-arrow-string'
at the overlay's start position.")