Fix major-mode setting regression when there's a mode: cookie

* lisp/files.el (hack-local-variables): Fix regression in setting
the major mode when there are mode: cookies in the file (bug#54993).

2 files changed, 10 insertions, 0 deletions

diff --git a/test/lisp/files-resources/file-mode b/test/lisp/files-resources/file-mode
new file mode 100644
index 00000000000..92ac4c30ef5
--- /dev/null
+++ b/test/lisp/files-resources/file-mode
@@ -0,0 +1,3 @@
+Local variables:
+mode: text
+end:
diff --git a/test/lisp/files-tests.el b/test/lisp/files-tests.el
index e4424f3cbed..f76d047f302 100644
--- a/test/lisp/files-tests.el
+++ b/test/lisp/files-tests.el
@@ -1814,5 +1814,12 @@ Prompt users for any modified buffer with `buffer-offer-save' non-nil."
   (should (equal (file-name-split "/foo/bar/") '("" "foo" "bar" "")))
   (should (equal (file-name-split "foo/bar/") '("foo" "bar" ""))))
 
+(ert-deftest files-test-set-mode ()
+  (find-file (ert-resource-file "file-mode"))
+  (should (eq major-mode 'text-mode))
+  (emacs-lisp-mode)
+  ;; Check that the mode cookie doesn't override the explicit setting.
+  (should (eq major-mode 'emacs-lisp-mode)))
+
 (provide 'files-tests)
 ;;; files-tests.el ends here