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-rw-r--r--tests/ui/kindck/kindck-send-object.stderr2
1 files changed, 2 insertions, 0 deletions
diff --git a/tests/ui/kindck/kindck-send-object.stderr b/tests/ui/kindck/kindck-send-object.stderr
index 284d5dcec31..27eebe27367 100644
--- a/tests/ui/kindck/kindck-send-object.stderr
+++ b/tests/ui/kindck/kindck-send-object.stderr
@@ -5,6 +5,7 @@ LL |     assert_send::<&'static (dyn Dummy + 'static)>();
    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `(dyn Dummy + 'static)` cannot be shared between threads safely
    |
    = help: the trait `Sync` is not implemented for `(dyn Dummy + 'static)`
+   = note: consider using `std::sync::Arc<(dyn Dummy + 'static)>`; for more information visit <https://doc.rust-lang.org/book/ch16-03-shared-state.html>
    = note: required for `&'static (dyn Dummy + 'static)` to implement `Send`
 note: required by a bound in `assert_send`
   --> $DIR/kindck-send-object.rs:5:18
@@ -19,6 +20,7 @@ LL |     assert_send::<Box<dyn Dummy>>();
    |                   ^^^^^^^^^^^^^^ `dyn Dummy` cannot be sent between threads safely
    |
    = help: the trait `Send` is not implemented for `dyn Dummy`
+   = note: consider using `std::sync::Arc<dyn Dummy>`; for more information visit <https://doc.rust-lang.org/book/ch16-03-shared-state.html>
    = note: required for `Unique<dyn Dummy>` to implement `Send`
 note: required because it appears within the type `Box<dyn Dummy>`
   --> $SRC_DIR/alloc/src/boxed.rs:LL:COL