From 90f63e34e9ab2546ddfd4a265505cb5f92f0258b Mon Sep 17 00:00:00 2001
From: Andreas Fackler <AndreasFackler@gmx.de>
Date: Thu, 11 Oct 2018 10:48:32 +0200
Subject: [PATCH] Remove explicit Send+Sync impl for Error.

---
 src/error.rs | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/src/error.rs b/src/error.rs
index fb26b81..3e41566 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -11,8 +11,18 @@ pub enum Error {
     DegreeTooHigh,
 }
 
-unsafe impl Send for Error {}
-unsafe impl Sync for Error {}
-
 /// A crypto result.
 pub type Result<T> = ::std::result::Result<T, Error>;
+
+#[cfg(test)]
+mod tests {
+    use super::Error;
+
+    /// No-op function that compiles only if its argument is `Send + Sync`.
+    fn is_send_and_sync<T: Send + Sync>(_: T) {}
+
+    #[test]
+    fn errors_are_send_and_sync() {
+        is_send_and_sync(Error::NotEnoughShares);
+    }
+}