From faf860924626ec084db0f5ef64737890bdbac4a0 Mon Sep 17 00:00:00 2001
From: Isis Lovecruft <isis@torproject.org>
Date: Thu, 5 Jul 2018 00:14:55 +0000
Subject: [PATCH] Copy the inversions of 0 warning to the invert() method.

---
 src/scalar.rs | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/scalar.rs b/src/scalar.rs
index 1004f57..7e23699 100644
--- a/src/scalar.rs
+++ b/src/scalar.rs
@@ -525,6 +525,16 @@ impl Scalar {
     }
 
     /// Compute the multiplicative inverse of this scalar.
+    ///
+    /// # Warning
+    ///
+    /// All input `Scalars` **MUST** be nonzero.  If you cannot
+    /// *prove* that this is the case, you **SHOULD NOT USE THIS
+    /// FUNCTION**.
+    ///
+    /// # Returns
+    ///
+    /// The multiplicative inverse of the this `Scalar`.
     pub fn invert(&self) -> Scalar {
         self.unpack().invert().pack()
     }