[petsc-users] check for NULL pointer in VecCreateGhost

[Mohammad Mirzadeh]

Hi,

Is there an internal check to see if the 'ghost' pointer in
VecCreateGhost() is NULL ? This can happen, for example, if the code is run
in serial and the there are no ghost points (hence n_ghost = 0 and ghost =
NULL(implementation dependent of course) ). AOXXXXToYYYY functions seem to
crash if the corresponding pointer is NULL.

Thanks,
Mohammad
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