``` /src/ext/ed25519/donna/ed25519_tor.c: 307 in ed25519_donna_blind_public_key() 301 ed25519_donna_gettweak(tweak, param); 302 expand256_modm(t, tweak, 32); 303 304 /* No "ge25519_unpack", negate the public key. */ 305 memcpy(pkcopy, inp, 32); 306 pkcopy[31] ^= (1<<7); >>> CID 1413651: Error handling issues (CHECKED_RETURN) >>> Calling "ge25519_unpack_negative_vartime" without checking return value (as is done elsewhere 4 out of 5 times). 307 ge25519_unpack_negative_vartime(&A, pkcopy); 308 309 /* A' = [tweak] * A + [0] * basepoint. */ 310 ge25519_double_scalarmult_vartime(&Aprime, &A, t, zero); 311 ge25519_pack(out, &Aprime); ```