From a5ff6f514bb533fa40686d8f002480ff7eaf24ba Mon Sep 17 00:00:00 2001
From: Jack Grigg <thestr4d@gmail.com>
Date: Fri, 30 Oct 2020 00:25:57 +0000
Subject: [PATCH] Fix deref breakage with nightly-2020-10-06

Fixes the following error:
  cannot multiply-assign `<E as Engine>::Fr` by `&&<E as Engine>::Fr`

I think this is related to:
  https://github.com/rust-lang/rust/issues/77638
---
 src/groth16/generator.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/groth16/generator.rs b/src/groth16/generator.rs
index f23265c..741c089 100644
--- a/src/groth16/generator.rs
+++ b/src/groth16/generator.rs
@@ -398,8 +398,8 @@ where
                             *b_g2 = g2_wnaf.scalar(&bt);
                         }
 
-                        at.mul_assign(&beta);
-                        bt.mul_assign(&alpha);
+                        at *= beta;
+                        bt *= alpha;
 
                         let mut e = at;
                         e.add_assign(&bt);