debug: print token before exception

Author: jaime-m-p

llama.cpp

@@ -4890,6 +4890,7 @@ static void llm_load_vocab(
         };
 
         auto _set_token_attrib = [&] (const std::string & token, llama_token_attrib attrib, bool value) {
+            LLAMA_LOG_INFO("_set_token_attrib: token='%s' attrib=%x value=%d\n", token.c_str(), (int)attrib, (int)value);
             _set_tokenid_attrib(vocab.token_to_id.at(token), attrib, value);
         };