20.1.13. Problems Due to Data Copying and Sequence Association with Vector Subscripts

Fortran arrays with vector subscripts describe subarrays containing a possibly irregular set of elements

Example Fortran irregular subarrays through using vector subscripts.

Fortran arrays with a vector subscript must not be used as actual choice buffer arguments in any nonblocking or split collective MPI operations. They may, however, be used in blocking MPI operations.