Disable display-line-numbers-mode in string-pixel-width (bug#59311)

* lisp/emacs-lisp/subr-x.el (string-pixel-width):
Turn off display-line-numbers-mode when it's enabled.

diff --git a/lisp/emacs-lisp/subr-x.el b/lisp/emacs-lisp/subr-x.el
index 6e4d88b4df354d0c8d781c8e5042c9192963e902..18087bc937fa477370351e2ec31f9c023ff14393 100644 (file)
--- a/lisp/emacs-lisp/subr-x.el
+++ b/lisp/emacs-lisp/subr-x.el
@@ -322,6 +322,10 @@ as the new values of the bound variables in the recursive invocation."
     ;; Keeping a work buffer around is more efficient than creating a
     ;; new temporary buffer.
     (with-current-buffer (get-buffer-create " *string-pixel-width*")
+      ;; `display-line-numbers-mode' is enabled in internal buffers
+      ;; that breaks width calculation, so need to disable (bug#59311)
+      (when (bound-and-true-p display-line-numbers-mode)
+        (display-line-numbers-mode -1))
       (delete-region (point-min) (point-max))
       (insert string)
       (car (buffer-text-pixel-size nil nil t)))))