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Update playground error messages

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Thalia Archibald
2025-08-21 18:18:20 -06:00
parent bae61dd786
commit 1ba06fe61c
8 changed files with 23 additions and 20 deletions
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blog/content/edition-2/posts/12-async-await/index.es.md
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@@ -632,21 +632,21 @@ Además de cambiar `Box::new` a `Box::pin`, también necesitamos añadir el nuev
Cuando [intentamos ejecutar nuestro ejemplo ajustado](https://play.rust-lang.org/?version=stable&mode=debug&edition=2024&gist=961b0db194bbe851ff4d0ed08d3bd98a) ahora, vemos que ya no funciona:
```
error[E0594]: cannot assign to data in a dereference of `std::pin::Pin<std::boxed::Box<SelfReferential>>`
error[E0594]: cannot assign to data in dereference of `Pin<Box<SelfReferential>>`
--> src/main.rs:10:5
|
10 | heap_value.self_ptr = ptr;
| ^^^^^^^^^^^^^^^^^^^^^^^^^ cannot assign
|
= help: trait `DerefMut` is required to modify through a dereference, but it is not implemented for `std::pin::Pin<std::boxed::Box<SelfReferential>>`
= help: trait `DerefMut` is required to modify through a dereference, but it is not implemented for `Pin<Box<SelfReferential>>`
error[E0596]: cannot borrow data in a dereference of `std::pin::Pin<std::boxed::Box<SelfReferential>>` as mutable
error[E0596]: cannot borrow data in dereference of `Pin<Box<SelfReferential>>` as mutable
--> src/main.rs:16:36
|
16 | let stack_value = mem::replace(&mut *heap_value, SelfReferential {
| ^^^^^^^^^^^^^^^^ cannot borrow as mutable
|
= help: trait `DerefMut` is required to modify through a dereference, but it is not implemented for `std::pin::Pin<std::boxed::Box<SelfReferential>>`
= help: trait `DerefMut` is required to modify through a dereference, but it is not implemented for `Pin<Box<SelfReferential>>`
```
Ambos errores ocurren porque el tipo `Pin<Box<SelfReferential>>` ya no implementa el trait `DerefMut`. Esto es exactamente lo que queremos porque el trait `DerefMut` devolvería una referencia `&mut`, que queremos prevenir. Esto solo ocurre porque ambos optamos por no implementar `Unpin` y cambiamos `Box::new` a `Box::pin`.