Fix .dir-local.el caching for symlinks

* lisp/files.el (dir-locals-read-from-dir): We want the time stamp
of the actual file, not the time stamp of the symlink (if
.dir-locals.el is a symlink) (bug#46122).

diff --git a/lisp/files.el b/lisp/files.el
index 22fccb151cdd226aadc61a1e8502e93d2a95d2a2..a804f0088eebb8b408ab5205d279c9937d2be85a 100644 (file)
--- a/lisp/files.el
+++ b/lisp/files.el
@@ -4497,7 +4497,7 @@ Return the new class name, which is a symbol named DIR."
     (with-demoted-errors "Error reading dir-locals: %S"
       (dolist (file files)
        (let ((file-time (file-attribute-modification-time
-                         (file-attributes file))))
+                         (file-attributes (file-chase-links file)))))
          (if (time-less-p latest file-time)
            (setq latest file-time)))
         (with-temp-buffer