error: The following options from group 'lazy/optional' cannot be used together: `lazy`, `optional`
 --> tests/uncompilable/incompat_args.rs
  |
  | #[fxstruct(lazy, optional)]
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |
  = note: this error originates in the attribute macro `fxstruct` (in Nightly builds, run with -Z macro-backtrace for more info)