Add message to `rustc_on_unimplemented` attributes in core

4 files changed, 4 insertions, 4 deletions

diff --git a/src/test/ui/error-codes/E0277-2.rs b/src/test/ui/error-codes/E0277-2.rs
index 4d1c50002a3..313aa1f706e 100644
--- a/src/test/ui/error-codes/E0277-2.rs
+++ b/src/test/ui/error-codes/E0277-2.rs
@@ -24,5 +24,5 @@ fn is_send<T: Send>() { }
 
 fn main() {
     is_send::<Foo>();
-    //~^ ERROR the trait bound `*const u8: std::marker::Send` is not satisfied in `Foo`
+    //~^ ERROR `*const u8` cannot be sent between threads safely
 }
diff --git a/src/test/ui/error-codes/E0277-2.stderr b/src/test/ui/error-codes/E0277-2.stderr
index bbe04cfc6e1..32776f028b4 100644
--- a/src/test/ui/error-codes/E0277-2.stderr
+++ b/src/test/ui/error-codes/E0277-2.stderr
@@ -1,4 +1,4 @@
-error[E0277]: the trait bound `*const u8: std::marker::Send` is not satisfied in `Foo`
+error[E0277]: `*const u8` cannot be sent between threads safely
   --> $DIR/E0277-2.rs:26:5
    |
 LL |     is_send::<Foo>();
diff --git a/src/test/ui/error-codes/E0277.rs b/src/test/ui/error-codes/E0277.rs
index b29e4357015..9ff2ef4da90 100644
--- a/src/test/ui/error-codes/E0277.rs
+++ b/src/test/ui/error-codes/E0277.rs
@@ -21,7 +21,7 @@ fn some_func<T: Foo>(foo: T) {
 }
 
 fn f(p: Path) { }
-//~^ ERROR the trait bound `[u8]: std::marker::Sized` is not satisfied in `std::path::Path`
+//~^ ERROR `[u8]` does not have a constant size known at compile-time
 
 fn main() {
     some_func(5i32);
diff --git a/src/test/ui/error-codes/E0277.stderr b/src/test/ui/error-codes/E0277.stderr
index 477128d7d9f..9cfd42b9c19 100644
--- a/src/test/ui/error-codes/E0277.stderr
+++ b/src/test/ui/error-codes/E0277.stderr
@@ -1,4 +1,4 @@
-error[E0277]: the trait bound `[u8]: std::marker::Sized` is not satisfied in `std::path::Path`
+error[E0277]: `[u8]` does not have a constant size known at compile-time
   --> $DIR/E0277.rs:23:6
    |
 LL | fn f(p: Path) { }