Handle null input

app.py

@@ -63,6 +63,9 @@ inputs = tokenizer([text])
 [input_ids] = inputs["input_ids"]
 window_len = min(window_len, len(input_ids))
 
+if len(input_ids) < 1:
+    st.stop()
+
 @st.cache_data(show_spinner=False)
 @torch.inference_mode()
 def run_context_length_probing(model_name, text, window_len):