Emacs Maintainers,   It appears that a menu item in the ‘calc’ package attempts   to invoke a function that does not exist.   Recipe for producing the error, starting with "emacs -Q"   (Emacs version 27.1)   1. Start the ‘calc’ programmable calculator in Emacs with   the keystrokes: C-x * c   2. Enter two three-element vectors onto calc’s stack with   the following keystrokes, separating each character with a   space or comma:   [ 1 2 3 ]   [ 4 5 6 ]   3. Attempting to calculate the dot product of the two   vectors using the Calc menu item: Calc -> Matrices/Vectors   -> Vectors -> (2:) dot (:1)     Emacs responds with the following error message in the   echo area: "Wrong type argument: commandp, calc-mult".     Note that the menu item also documents the keystroke   alternative, ‘*’.  C-h k * reports that ‘*’ invokes the   function ‘calc-times’.  Likewise, the alternative menu   item Calc -> Matrices/Vectors -> Matrices -> (2:) dot (:1)   also invokes the function ‘calc-times’.  This menu item   and ‘*’ produce the same result.   The Calc -> Matrices/Vectors -> Vectors sub-menu is   defined in the file calc-menu.el (in the lisp/calc   sub-directory): (defvar calc-vectors-menu ...).   The entry that lists the non-existent ‘calc-mult’ function  reads:               ["(2:) dot (1:)"               calc-mult               :keys "*"               :active (>= (calc-stack-size) 2)               :help "The dot product"] --