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Author: kovidgoyal

kitty/rc/set_background_opacity.py

@@ -73,7 +73,7 @@ def response_from_kitty(self, boss: Boss, window: Window | None, payload_get: Pa
                 # GLFW represents opacity as a float internally, but python's
                 # "float" type has double precision, so we can't rely on precise
                 # equality here
-                if abs(current - val) <= 0.0001:
+                if current is not None and abs(current - val) <= 0.0001:
                     val = opts.background_opacity
             boss._set_os_window_background_opacity(os_window_id, val)
         return None