--- a/src/luan/modules/IoLuan.java	Sun Nov 30 20:31:55 2025 -0700
+++ b/src/luan/modules/IoLuan.java	Mon Dec 01 06:46:35 2025 -0700
@@ -232,13 +232,13 @@
 				InputStream in = inputStream();
 				IoUtils.copyAll(in,out);
 				in.close();
-				out.close();
+				out.flush();
 			} else if( obj instanceof Writer ) {
 				Writer out = (Writer)obj;
 				Reader in = reader();
 				IoUtils.copyAll(in,out);
 				in.close();
-				out.close();
+				out.flush();
 			} else
 				throw new LuanException("invalid type: "+obj);
 		}