[elpa] externals/taxy 3787f4f 25/42: Fix: (deffy-buffer) Ensure file name

[ELPA Syncer]

branch: externals/taxy
commit 3787f4f6b263ba90102fffc75179cb70391c8140
Author: Adam Porter <adam@alphapapa.net>
Commit: Adam Porter <adam@alphapapa.net>

    Fix: (deffy-buffer) Ensure file name
---
 examples/deffy.el | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/examples/deffy.el b/examples/deffy.el
index 67fb454..46e9087 100644
--- a/examples/deffy.el
+++ b/examples/deffy.el
@@ -211,6 +211,9 @@ Interactively, with prefix, display in dedicated side 
window."
    (list (current-buffer)
         :display-buffer-action (when current-prefix-arg
                                  deffy-side-window-action)))
+  (unless (buffer-file-name buffer)
+    (user-error "Buffer is not file-backed: %S.  See command `deffy-project'"
+               buffer))
   (deffy :files (list (buffer-file-name buffer))
     :keys (remove 'file deffy-taxy-default-keys)
     :display-buffer-action display-buffer-action))