message: update to rust 1.67.0
diff: @@ -107,7 +107,7 @@ impl<'f> BcWriter<'f> {
  }
  /// Finish writing the bytecode.
  - #[allow(clippy::let_underscore_drop)]
  + #[allow(let_underscore_drop)]
  pub(crate) fn finish(self) -> Bc {
  let BcWriter {
  profile: has_before_instr,
  