M-: (helpful-variable 'magit-branch-popup)

This is a bug with calculate-lisp-indent , which <code

(scan-error "Containing expression ends prematurely" 2 2) about helpful HOT 2 CLOSED

wilfred commented on July 28, 2024

(scan-error "Containing expression ends prematurely" 2 2)

from helpful.

Comments (2)

Wilfred commented on July 28, 2024

This is a bug with calculate-lisp-indent, which helpful--pretty-print calls via cl-prettyprint. If you have a sufficiently large list literal, e.g.

(:variable magit-branch-arguments :man-page "git-branch" :actions
           ((98 "Checkout" magit-checkout)
            (110 "Create new branch" magit-branch)
            (67 "Configure..." magit-branch-config-popup)
            (99 "Checkout new branch" magit-branch-and-checkout)
            (115 "Create new spin-off" magit-branch-spinoff)
            (109 "Rename" magit-branch-rename)
            (119 "Checkout new worktree" magit-worktree-checkout)
            (87 "Create new worktree" magit-worktree-branch)
            (120 "Reset" magit-branch-reset)
            nil nil
            (107 "Delete" magit-branch-delete)
            (102 "new branch From current" wh/magit-branch-from-current-and-checkout))
           :default-action magit-checkout :max-action-columns 3 :setup-function magit-branch-popup-setup)
;; or
(:foo foooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo :bar bar)

Then cl-prettyprint adds newlines, splitting the list over multiple lines. It looks like lisp-indent-line can't handle code of the form: