netcdf test_struct_nested3.nc {
types:
  compound x_field3_field2_t {
    int field1 ;
  }; // x_field3_field2_t
  compound x_field3_t {
    x_field3_field2_t field2 ;
  }; // x_field3_t
  compound x_t {
    x_field3_t field3 ;
  }; // x_t
variables:
	x_t x ;

data:

 x = {{{17}}} ;
}