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Add rustc_on_unimplemented on Sync for cell types

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Suggest using a lock instead.
This commit is contained in:
Nilstrieb 2023-01-16 18:51:31 +01:00
parent e1f630f23d
commit 6d0c91fda3
18 changed files with 229 additions and 5 deletions
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2
tests/ui/stdlib-unit-tests/not-sync.stderr
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@ -5,6 +5,7 @@ LL | test::<Cell<i32>>();
| ^^^^^^^^^ `Cell<i32>` cannot be shared between threads safely
|
= help: the trait `Sync` is not implemented for `Cell<i32>`
= note: if you want to do aliasing and mutation between multiple threads, use `std::sync::RwLock` or `std::sync::atomic::AtomicI32` instead
note: required by a bound in `test`
--> $DIR/not-sync.rs:5:12
|
@ -18,6 +19,7 @@ LL | test::<RefCell<i32>>();
| ^^^^^^^^^^^^ `RefCell<i32>` cannot be shared between threads safely
|
= help: the trait `Sync` is not implemented for `RefCell<i32>`
= note: if you want to do aliasing and mutation between multiple threads, use `std::sync::RwLock` instead
note: required by a bound in `test`
--> $DIR/not-sync.rs:5:12
|