auto merge of #19867 : japaric/rust/deriving-copy, r=acrichto

r? @alexcrichton 

1 files changed, 1 insertions, 3 deletions

diff --git a/src/libstd/comm/mod.rs b/src/libstd/comm/mod.rs
index 8f945fec4d5..9043cb8c7d6 100644
--- a/src/libstd/comm/mod.rs
+++ b/src/libstd/comm/mod.rs
@@ -391,7 +391,7 @@ pub struct SyncSender<T> {
 
 /// This enumeration is the list of the possible reasons that try_recv could not
 /// return data when called.
-#[deriving(PartialEq, Clone, Show)]
+#[deriving(PartialEq, Clone, Copy, Show)]
 #[experimental = "this is likely to be removed in changing try_recv()"]
 pub enum TryRecvError {
     /// This channel is currently empty, but the sender(s) have not yet
@@ -402,8 +402,6 @@ pub enum TryRecvError {
     Disconnected,
 }
 
-impl Copy for TryRecvError {}
-
 /// This enumeration is the list of the possible error outcomes for the
 /// `SyncSender::try_send` method.
 #[deriving(PartialEq, Clone, Show)]