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/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);