Merging upstream version 1.69.0+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 17 insertions, 0 deletions

diff --git a/tests/ui/sync/suggest-ref-cell.stderr b/tests/ui/sync/suggest-ref-cell.stderr
new file mode 100644
index 000000000..9e8b8fcb4
--- /dev/null
+++ b/tests/ui/sync/suggest-ref-cell.stderr
@@ -0,0 +1,17 @@
+error[E0277]: `RefCell<()>` cannot be shared between threads safely
+  --> $DIR/suggest-ref-cell.rs:8:20
+   |
+LL |     require_sync::<std::cell::RefCell<()>>();
+   |                    ^^^^^^^^^^^^^^^^^^^^^^ `RefCell<()>` cannot be shared between threads safely
+   |
+   = help: the trait `Sync` is not implemented for `RefCell<()>`
+   = note: if you want to do aliasing and mutation between multiple threads, use `std::sync::RwLock` instead
+note: required by a bound in `require_sync`
+  --> $DIR/suggest-ref-cell.rs:3:20
+   |
+LL | fn require_sync<T: Sync>() {}
+   |                    ^^^^ required by this bound in `require_sync`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0277`.