message: Use .ok() instead of a match
diff: @@ -650,10 +650,7 @@ impl<F: FftField + SquareRootField> ConstraintSystem<F> {
  // ------
  let lookup_constraint_system =
  - match LookupConstraintSystem::create(&gates, lookup_tables, &domain) {
  - Ok(res) => res,
  - Err(_) => None?,
  - };
  + LookupConstraintSystem::create(&gates, lookup_tables, &domain).ok()?;
  //
  // Constant polynomials
  