Use mod vendor for vendored directory (backwards compatible)

1 files changed, 2 insertions, 1 deletions

diff --git a/vendor/golang.org/x/crypto/salsa20/salsa/salsa20_amd64.go b/vendor/golang.org/x/crypto/salsa20/salsa/salsa20_amd64.go
index 903c7858..f9269c38 100644
--- a/vendor/golang.org/x/crypto/salsa20/salsa/salsa20_amd64.go
+++ b/vendor/golang.org/x/crypto/salsa20/salsa/salsa20_amd64.go
@@ -13,11 +13,12 @@ package salsa
 func salsa2020XORKeyStream(out, in *byte, n uint64, nonce, key *byte)
 
 // XORKeyStream crypts bytes from in to out using the given key and counters.
-// In and out may be the same slice but otherwise should not overlap. Counter
+// In and out must overlap entirely or not at all. Counter
 // contains the raw salsa20 counter bytes (both nonce and block counter).
 func XORKeyStream(out, in []byte, counter *[16]byte, key *[32]byte) {
 	if len(in) == 0 {
 		return
 	}
+	_ = out[len(in)-1]
 	salsa2020XORKeyStream(&out[0], &in[0], uint64(len(in)), &counter[0], &key[0])
 }