diff options
Diffstat (limited to 'library')
| -rw-r--r-- | library/core/src/marker.rs | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/library/core/src/marker.rs b/library/core/src/marker.rs index 5ec751e5168..aec287226a0 100644 --- a/library/core/src/marker.rs +++ b/library/core/src/marker.rs @@ -76,8 +76,11 @@ macro marker_impls { #[stable(feature = "rust1", since = "1.0.0")] #[cfg_attr(not(test), rustc_diagnostic_item = "Send")] #[rustc_on_unimplemented( + on(_Self = "std::rc::Rc<T, A>", note = "use `std::sync::Arc` instead of `std::rc::Rc`"), message = "`{Self}` cannot be sent between threads safely", - label = "`{Self}` cannot be sent between threads safely" + label = "`{Self}` cannot be sent between threads safely", + note = "consider using `std::sync::Arc<{Self}>`; for more information visit \ + <https://doc.rust-lang.org/book/ch16-03-shared-state.html>" )] pub unsafe auto trait Send { // empty. @@ -628,8 +631,11 @@ impl<T: ?Sized> Copy for &T {} any(_Self = "core::cell::RefCell<T>", _Self = "std::cell::RefCell<T>"), note = "if you want to do aliasing and mutation between multiple threads, use `std::sync::RwLock` instead", ), + on(_Self = "std::rc::Rc<T, A>", note = "use `std::sync::Arc` instead of `std::rc::Rc`"), message = "`{Self}` cannot be shared between threads safely", - label = "`{Self}` cannot be shared between threads safely" + label = "`{Self}` cannot be shared between threads safely", + note = "consider using `std::sync::Arc<{Self}>`; for more information visit \ + <https://doc.rust-lang.org/book/ch16-03-shared-state.html>" )] pub unsafe auto trait Sync { // FIXME(estebank): once support to add notes in `rustc_on_unimplemented` |