Preparing for release, so a bit of maintenance.

internal/atspi/adapter_events.c

@@ -247,7 +247,15 @@ static AtspiAccessible *cthulhu_collection_descendant(AtspiAccessible *window,
             }
         }
         if (error != NULL) g_clear_error(&error);
-        if (matches != NULL) g_array_unref(matches);
+        if (matches != NULL) {
+            // Collection results own each accessible as well as the array.
+            // Keep only the separate reference returned as target.
+            for (guint index = 0; index < matches->len; index++) {
+                AtspiAccessible *match = g_array_index(matches, AtspiAccessible *, index);
+                if (match != NULL) g_object_unref(match);
+            }
+            g_array_unref(matches);
+        }
         g_object_unref(rule);
         g_object_unref(states);
         if (roles != NULL) g_array_unref(roles);