  We address the problem of the post-prior equivalence in inclusive breakup
reactions induced by weakly-bound nuclei. The problem is studied within the
DWBA model of Ichimura, Austern, Vincent [Phys. Rev. C32, 431 (1985)]. The post
and prior formulas obtained in this model are briefly recalled, and applied to
several breakup reactions induced by deuterons and $^6$Li projectiles, to test
their actual numerical equivalence. The different contributions of the
prior-form formula are also discussed. A critical comparison with the
prior-form distorted-wave Born approximation (DWBA) model of Udagawa and Tamura
[Phys. Rev. C24, 1348 (1981)] is also provided.
