As far as I know, the Church rejects the very idea that God could destine any man to damnation as a heresy. If I am wrong, prove me wrong.
The Church rejects only unconditioned reprobation ante praevisa demerita, that is, without consideration of foreseen demerits; this is condemned. The Church holds on to conditioned reprobation post praevisa demerita, i.e. in light of foreseen demerits.
Ott:
GOD, BY AN ETERNAL RESOLVE OF HIS WILL, PREDESTINES CERTAIN MEN, ON ACCOUNT OF THEIR FORESEEN SINS, TO ETERNAL REJECTION (De fide)
The reality of Reprobation is not formally defined, but it is the general teaching of the Church.
- POSITIVE REPROBATION
Heretical Predestinationism in its various forms (the Southern Gallic priest Lucidus in the 5th century; the monk Gottschalk in the 9th century, according to reports of his opponents, which, however, find no confirmation in his recently re-discovered writings; Wycliffe, Hus, and esp. Calvin), teaches a positive predetermination to sin, and an unconditional Predestination to the eternal punishment of hell, that is, without consideration of future demerits. This was rejected as false doctrine by the Particular Synods of Orange, Quiercy & Valence and by the Council of Trent. Unconditioned positive Reprobation leads to a denial of the universality of the Divine Desire for salvation, and of the Redemption, and contradicts the Justice and Holiness of God as well as the freedom of man.
According to the teaching of the Church, there is a conditioned positive Reprobation, that is, it occurs with consideration of foreseen future demerits (post et propter praevisa demerita). The conditional nature of Positive Reprobation is demanded by the generality of the Divine Resolve of salvation. This excludes God’s desiring in advance the damnation of certain men (cf. 1 Tim 2:4, Ezek 33:11, 2 Pet 3:9) . . .
- NEGATIVE REPROBATION
In the question of Reprobation, the Thomist view favours not an absolute, but only a negative Reprobation. This is conceived by most Thomists as non-election to eternal bliss (non-electio), together with the Divine resolve to permit some rational creatures to fall into sin, and thus by their own guilt to lose eternal salvation. In contrast to the absolute Positive Reprobation of the Predestinarians, Thomists insist on the universality of the Divine Resolve of Salvation and Redemption, the allocation of sufficient graces to the reprobate, and the freedom of man’s will. However, it is difficult to find an intrinsic concordance between unconditioned non-election and the universality of the Divine Resolve of salvation. In practice, the unconditioned negative Reprobation of the Thomists involves the same result as the unconditioned positive Reprobation of the heretical Predestinarians, since outside Heaven and Hell there is no third final state.
Like the Resolve of Predestination the Divine Resolve of Reprobation is immutable, but, without special revelation, its incidence is unknown to men.