[petsc-dev] assuming sizeof(PetscInt) <= sizeof(PetscScalar)

[Barry Smith]

   It appears people have been assuming sizeof(PetscInt) <= sizeof(PetscScalar) right and left in the code (to take advantage of VecScatter functionality). This is most definitely not true with —with-64-bit-indices —with-precision=single

MatGetBrowsOfAoCols_MPIAIJ
PCGAMGProlongator_Classical_Standard
maybe others

VecScatters are for moving Vec elements around, they are not a replacement for MPI calls!

Please don’t do this in the future.

   Barry