Disallow empty values in url-incdec-segments

qutebrowser/browser/commands.py

@@ -451,11 +451,7 @@ class CommandDispatcher:
             background: Open the link in a new background tab.
             window: Open the link in a new window.
         """
-        segments = config.get('general', 'url-incdec-segments')
-        if segments is None:
-            segments = set()
-        else:
-            segments = set(segments)
+        segments = set(config.get('general', 'url-incdec-segments'))
         try:
             new_url = urlutils.incdec_number(url, incdec, segments=segments)
         except urlutils.IncDecError as error:

qutebrowser/config/configdata.py

@@ -227,7 +227,7 @@ def data(readonly=False):
              "last loaded session."),
 
             ('url-incdec-segments',
-             SettingValue(typ.URLSegmentList(none_ok=True), 'path,query'),
+             SettingValue(typ.URLSegmentList(), 'path,query'),
              "The URL segments where `:navigate increment/decrement` will "
              "search for a number."),