--- alexandria-book-collection-manager-0.7.4/lib/alexandria/ui/new_book_dialog.rb.nothread	2020-01-03 17:37:42.394366241 +0900

+++ alexandria-book-collection-manager-0.7.4/lib/alexandria/ui/new_book_dialog.rb	2020-01-04 13:24:08.240415691 +0900

@@ -279,15 +279,17 @@ module Alexandria

                          get_images_async

                          false # continue == false if you get to here. Stop timeout.

                        end

-                     else

+                     elsif @find_thread

                        # Stop if the book find thread has stopped.

                        @find_thread.alive?

+                     else

+                       true

                      end

           # continue == false if @find_error OR if results are returned

           # timeout ends if continue is false!

           unless continue

-            unless @find_thread.alive? # This happens after find_thread is done

+            unless (@find_thread && @find_thread.alive?) # This happens after find_thread is done

               unless @destroyed

                 # GLib::Source.remove(progress_pulsing)

                 # @progressbar.hide