Make flymake-show-buffer-diagnostics error out in non-Flymake buffers

* lisp/progmodes/flymake.el (flymake-show-buffer-diagnostics):
Signal an error if run outside of a buffer with Flymake enabled
(bug#55097).

diff --git a/lisp/progmodes/flymake.el b/lisp/progmodes/flymake.el
index 83d7bc8641cd42b5f1cef8760dfcbf9ee36dad54..8cbebe78fe1334d5501eef41b073b297c78404e0 100644 (file)
--- a/lisp/progmodes/flymake.el
+++ b/lisp/progmodes/flymake.el
@@ -1637,6 +1637,8 @@ buffer."
 (defun flymake-show-buffer-diagnostics ()
   "Show a list of Flymake diagnostics for current buffer."
   (interactive)
+  (unless flymake-mode
+    (user-error "Flymake mode is not enabled in the current buffer"))
   (let* ((name (flymake--diagnostics-buffer-name))
          (source (current-buffer))
          (target (or (get-buffer name)