flatbuffers/tests/required_table_default_test.fbs

namespace RequiredTableDefaultTestNS;

table Inner {
  value: uint32;
}

// `required_inner` has no default in the wire format (tables can't have one),
// but Pack()/Verify() both reject a buffer where it is missing - so the
// native default constructor must never leave it null. `optional_inner` is
// the same field type without `required`, kept alongside it to confirm the
// fix only changes required table fields, not every table pointer field.
table Holder {
  required_inner: Inner (required);
  optional_inner: Inner;
}

root_type Holder;