From e8eb15f05e5c5ba4de5989f5eb0a9eb390102738 Mon Sep 17 00:00:00 2001
From: Michael Debertol <michael.debertol@gmail.com>
Date: Sun, 1 Aug 2021 16:50:33 +0200
Subject: [PATCH] core/error: require UCustomError to be Send

For multi-threaded programs like sort it is necessary to be able to send
errors between threads.
---
 src/uucore/src/lib/mods/error.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/uucore/src/lib/mods/error.rs b/src/uucore/src/lib/mods/error.rs
index c64e7df66..d82da9feb 100644
--- a/src/uucore/src/lib/mods/error.rs
+++ b/src/uucore/src/lib/mods/error.rs
@@ -251,7 +251,7 @@ impl Display for UError {
 ///
 /// A crate like [`quick_error`](https://crates.io/crates/quick-error) might
 /// also be used, but will still require an `impl` for the `code` method.
-pub trait UCustomError: Error {
+pub trait UCustomError: Error + Send {
     /// Error code of a custom error.
     ///
     /// Set a return value for each variant of an enum-type to associate an