In the decrees of the Council of Trent: Canons on Justification, Roman Catholics proclaim a curse (anathema) on anyone who affirms the loss of free will after the fall. In Canon 5, it declares:
"If anyone says that after the sin of Adam man's free will was lost and destroyed, or that it is a thing only in name, indeed a name without a reality, a fiction introduced into the Church by Satan, let him be anathema."
By doing so, they are anathematizing their own doctor of the church, St. Augustine for he said precisely this: on multiple occassions:
"Man when he was created received great powers of free will, but lost them by sinning." - Confessions
Can they do anything by the free determination of their own will? Again I say, God forbid. For it was by the evil use of his free-will that man destroyed both it and himself. For, as a man who kills himself must, of course, be alive when he kills himself, but after he has killed himself ceases to live, and cannot restore himself to life; so, when man by his own free-will sinned, then sin being victorious over him, the freedom of his will was lost.
Augustine, Enchiridion 30
"Without the Spirit man's will is not free, since it has been laid under by shackling and conquering desires." - Augustine, Letters cxlv 2 (MPL 33. 593; tr FC 20. 163f.)
"When the will was conquered by the vice into which it had fallen, human nature began to lose its freedom." - Augustine, On Man's Perfection in Righteousness iv 9 (MLP 44. 296; tr. NPNF V. 161)
"Through freedom man came to be in sin, but the corruption which followed as punishment turned freedom into necessity." - Augustine On Man's Perfection In Righteousness
"If, therefore, they are the slaves of sin, why do they boast of free will? For ‘by whatever a person is overcome, to that he is delivered as a slave’ (2 Pet.2:19). But if they have been set free, why do they puff themselves up as if it were by their own doing? Why do they boast, as if their freedom were not a gift? Or are they so free that they will not have Him for their Lord Who says to them, ‘Without Me, you can do nothing’ (Jn.15:5), and, ‘If the Son sets you free, you shall be truly free?’ (Jn.8:36)." - Augustine