Merge pull request #1869 from joshtriplett/fix-copy-clone-no-derive

Author: JohnTitor

ci/style.rs

@@ -134,6 +134,9 @@ fn check_style(file: &str, path: &Path, err: &mut Errors) {
                                     instead of #[cfg]");
             }
         }
+        if line.contains("#[derive(") && (line.contains("Copy") || line.contains("Clone")) {
+            err.error(path, i, "impl ::Copy and ::Clone manually");
+        }
 
         let line = line.trim_start();
         let is_pub = line.starts_with("pub ");

src/unix/linux_like/linux/gnu/mod.rs

@@ -317,14 +317,19 @@ cfg_if! {
     if #[cfg(libc_union)] {
         // Internal, for casts to access union fields
         #[repr(C)]
-        #[derive(Copy,Clone)]
         struct sifields_sigchld {
             si_pid: ::pid_t,
             si_uid: ::uid_t,
             si_status: ::c_int,
             si_utime: ::c_long,
             si_stime: ::c_long,
         }
+        impl ::Copy for sifields_sigchld {}
+        impl ::Clone for sifields_sigchld {
+            fn clone(&self) -> sifields_sigchld {
+                *self
+            }
+        }
 
         // Internal, for casts to access union fields
         #[repr(C)]