f check ser len always

Author: TheBlueMatt

lightning/src/util/ser_macros.rs

@@ -176,6 +176,7 @@ macro_rules! impl_writeable {
 						let mut len_calc = LengthCalculatingWriter(0);
 						$( self.$field.write(&mut len_calc).expect("No in-memory data may fail to serialize"); )*
 						assert_eq!(len_calc.0, $len);
+						assert_eq!(self.serialized_length(), $len);
 					}
 				}
 				$( self.$field.write(w)?; )*
@@ -222,6 +223,7 @@ macro_rules! impl_writeable_len_match {
 					let mut len_calc = LengthCalculatingWriter(0);
 					$( self.$field.write(&mut len_calc).expect("No in-memory data may fail to serialize"); )*
 					assert!(len_calc.0 $cmp len);
+					assert_eq!(len_calc.0, self.serialized_length());
 				}
 				$( self.$field.write(w)?; )*
 				Ok(())