UIFilterCombo: Fix exception when registry is weird or empty

1 files changed, 11 insertions, 7 deletions

diff --git a/GstInspector/GUI/filters.py b/GstInspector/GUI/filters.py
index 7f80256..fdc52ec 100644
--- a/GstInspector/GUI/filters.py
+++ b/GstInspector/GUI/filters.py
@@ -338,14 +338,18 @@ class UIFilterCombo (UIFilter):
         model = widget.props.model
 
         if self.default_param is None:
-            self.param = self.get_initial_default ()
+            default = self.get_initial_default ()
         else:
-            try:
-                self.param = self.default_param
-            except KeyError:
-                # The param does not exist in the new data anymore, fall back:
-                self.param = self.get_initial_default ()
-            self.default_param = None
+            default = self.default_param
+
+        try:
+            self.param = default
+        except KeyError:
+            # The param does not exist in the new data anymore, fall back:
+            default = self.get_initial_default ()
+            if default is not None:
+                self.param = default
+        self.default_param = None
 
 class UIFilterComboNested (UIFilterCombo):