emacs-29 ff21717f05b: Disable failing test (bug#65156)

[Mattias Engdegård]

branch: emacs-29
commit ff21717f05b2cd48015a8c05d89a1ff7e598fb1b
Author: Mattias Engdegård <mattiase@acm.org>
Commit: Mattias Engdegård <mattiase@acm.org>

    Disable failing test (bug#65156)
    
    * test/src/fileio-tests.el (fileio-tests--non-regular-insert):
    Mark as :unstable, since /dev/urandom is seekable.
    
    Do not merge to master.
---
 test/src/fileio-tests.el | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/test/src/fileio-tests.el b/test/src/fileio-tests.el
index 50642420ce9..5bc1024ff20 100644
--- a/test/src/fileio-tests.el
+++ b/test/src/fileio-tests.el
@@ -194,6 +194,8 @@ Also check that an encoding error can appear in a symlink."
   (should (equal (file-name-concat "" "") "")))
 
 (ert-deftest fileio-tests--non-regular-insert ()
+  ;; Fails in Emacs 29 because /dev/urandom is typically seekable (bug#65156)
+  :tags '(:unstable)
   (skip-unless (file-exists-p "/dev/urandom"))
   (with-temp-buffer
     (set-buffer-multibyte nil)