Fix: (org-ql-select) Don't search hidden/special buffers

README.org

@@ -386,6 +386,7 @@ Expands into a call to ~org-ql-select~ with the same arguments.  For convenience
 +  Handle date ranges in date-based selectors.  (Thanks to [[https://github.com/codygman][Cody Goodman]], [[https://github.com/swflint][Samuel W. Flint]], and [[https://github.com/vikasrawal][Vikas Rawal]].)
 +  Don't overwrite bindings in =org-agenda-mode-map=.
 +  Don't search buffers without headings, and show a message if the user attempts it.
++  Don't search hidden/special buffers.
 
 *Compatibility*
 +  Fixes for compatibility with Org 9.2.  (Thanks to [[https://github.com/ataias][Ataias Pereira Reis]] and [[https://github.com/dakra][Daniel Kraus]].)

org-ql.el

@@ -156,7 +156,9 @@ non-nil."
                                                ;; It feels unintuitive that `find-file-noselect' returns
                                                ;; a buffer if the filename doesn't exist.
                                                (find-file-noselect it))
-                                             (user-error "Can't open file: %s" it)))))))
+                                             (user-error "Can't open file: %s" it)))))
+                        ;; Ignore special/hidden buffers.
+                        (--remove (string-prefix-p " " (buffer-name it)))))
           (query (org-ql--pre-process-query query))
           ((query preamble-re) (org-ql--query-preamble query))
           (predicate (org-ql--query-predicate query))