17462 FIX Don't create crash report on invalid regex in quicksearch

SUP-21223

Change-Id: I9a728af925b434460d4ce923cdd84851e3e2d527

.werks/17462

@@ -0,0 +1,13 @@
+Title: Don't create crash report on invalid regex in quicksearch
+Class: fix
+Compatible: compat
+Component: multisite
+Date: 1734348625
+Edition: cre
+Level: 1
+Version: 2.2.0p38
+
+If an invalid regex was used in the quicksearch, a user error message was
+shown and in the background a crash report was created.
+
+Now only the user error message will be shown.

cmk/gui/plugins/sidebar/search.py

@@ -743,6 +743,7 @@ def _ajax_search(self) -> None:
         if not query:
             return
 
+        search_objects: list[ABCQuicksearchConductor] = []
         try:
             search_objects = self._quicksearch_manager._determine_search_objects(
                 livestatus.lqencode(query)
@@ -764,6 +765,9 @@ def _ajax_search(self) -> None:
                 raise
             html.show_error(traceback.format_exc())
 
+        if not search_objects:
+            return
+
         QuicksearchResultRenderer().show(
             self._quicksearch_manager._evaluate_results(search_objects), query
         )