{"ast_node_type":"variable","tokens":[{"end":31,"kind":"keyword","start":0,"text":"let"}]}
                let call_inst =
                let func_ref = m.declare_func_in_func(start_func_id, &mut bcx.func);
                    bcx.ins().call(func_ref, &[main_val, arg_argc, arg_argv, arg_sigpipe]);