rust/tests/ui/cast/ptr-to-trait-obj-add-auto.stderr

warning: adding an auto trait `Send` to a trait object in a pointer cast may cause UB later on
  --> $DIR/ptr-to-trait-obj-add-auto.rs:6:5
   |
LL |     x as _
   |     ^^^^^^
   |
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #127323 <https://github.com/rust-lang/rust/issues/127323>
   = note: `#[warn(ptr_cast_add_auto_to_object)]` on by default

warning: adding auto traits `Send`, `Sync`, and `Unpin` to a trait object in a pointer cast may cause UB later on
  --> $DIR/ptr-to-trait-obj-add-auto.rs:13:5
   |
LL |     x as _
   |     ^^^^^^
   |
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #127323 <https://github.com/rust-lang/rust/issues/127323>

warning: 2 warnings emitted

Future incompatibility report: Future breakage diagnostic:
warning: adding an auto trait `Send` to a trait object in a pointer cast may cause UB later on
  --> $DIR/ptr-to-trait-obj-add-auto.rs:6:5
   |
LL |     x as _
   |     ^^^^^^
   |
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #127323 <https://github.com/rust-lang/rust/issues/127323>
   = note: `#[warn(ptr_cast_add_auto_to_object)]` on by default

Future breakage diagnostic:
warning: adding auto traits `Send`, `Sync`, and `Unpin` to a trait object in a pointer cast may cause UB later on
  --> $DIR/ptr-to-trait-obj-add-auto.rs:13:5
   |
LL |     x as _
   |     ^^^^^^
   |
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #127323 <https://github.com/rust-lang/rust/issues/127323>
   = note: `#[warn(ptr_cast_add_auto_to_object)]` on by default
Align the changes to the lang decision 2024-06-23 12:55:17 -05:00			warning: adding an auto trait `Send` to a trait object in a pointer cast may cause UB later on
Add more checks for pointers with vtable meta The rules for casting `mut X<dyn A>` -> `mut Y<dyn B>` are as follows: - If `B` has a principal - `A` must have exactly the same principal (including generics) - Auto traits of `B` must be a subset of autotraits in `A` Note that `X<_>` and `Y<_>` can be identity, or arbitrary structs with last field being the dyn type. The lifetime of the trait object itself (`dyn ... + 'a`) is not checked. This prevents a few soundness issues with `#![feature(arbitrary_self_types)]` and trait upcasting. Namely, these checks make sure that vtable is always valid for the pointee. 2024-02-12 15:24:48 -06:00			`--> $DIR/ptr-to-trait-obj-add-auto.rs:6:5`
			`\|`
			`LL \| x as _`
Align the changes to the lang decision 2024-06-23 12:55:17 -05:00			`\| ^^^^^^`
Add more checks for pointers with vtable meta The rules for casting `mut X<dyn A>` -> `mut Y<dyn B>` are as follows: - If `B` has a principal - `A` must have exactly the same principal (including generics) - Auto traits of `B` must be a subset of autotraits in `A` Note that `X<_>` and `Y<_>` can be identity, or arbitrary structs with last field being the dyn type. The lifetime of the trait object itself (`dyn ... + 'a`) is not checked. This prevents a few soundness issues with `#![feature(arbitrary_self_types)]` and trait upcasting. Namely, these checks make sure that vtable is always valid for the pointee. 2024-02-12 15:24:48 -06:00			`\|`
Align the changes to the lang decision 2024-06-23 12:55:17 -05:00			`= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!`
Fill in tracking issue 2024-07-04 10:52:01 -05:00			`= note: for more information, see issue #127323 <https://github.com/rust-lang/rust/issues/127323>`
Align the changes to the lang decision 2024-06-23 12:55:17 -05:00			= note: `#[warn(ptr_cast_add_auto_to_object)]` on by default
Add more checks for pointers with vtable meta The rules for casting `mut X<dyn A>` -> `mut Y<dyn B>` are as follows: - If `B` has a principal - `A` must have exactly the same principal (including generics) - Auto traits of `B` must be a subset of autotraits in `A` Note that `X<_>` and `Y<_>` can be identity, or arbitrary structs with last field being the dyn type. The lifetime of the trait object itself (`dyn ... + 'a`) is not checked. This prevents a few soundness issues with `#![feature(arbitrary_self_types)]` and trait upcasting. Namely, these checks make sure that vtable is always valid for the pointee. 2024-02-12 15:24:48 -06:00
Sort trait names before printing 2024-07-04 11:38:18 -05:00			warning: adding auto traits `Send`, `Sync`, and `Unpin` to a trait object in a pointer cast may cause UB later on
Use `DiagSymbolList` for a lint diagnostic 2024-07-04 09:46:00 -05:00			`--> $DIR/ptr-to-trait-obj-add-auto.rs:13:5`
			`\|`
			`LL \| x as _`
			`\| ^^^^^^`
			`\|`
			`= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!`
Fill in tracking issue 2024-07-04 10:52:01 -05:00			`= note: for more information, see issue #127323 <https://github.com/rust-lang/rust/issues/127323>`
Use `DiagSymbolList` for a lint diagnostic 2024-07-04 09:46:00 -05:00
			`warning: 2 warnings emitted`
Align the changes to the lang decision 2024-06-23 12:55:17 -05:00
			`Future incompatibility report: Future breakage diagnostic:`
			warning: adding an auto trait `Send` to a trait object in a pointer cast may cause UB later on
			`--> $DIR/ptr-to-trait-obj-add-auto.rs:6:5`
			`\|`
			`LL \| x as _`
			`\| ^^^^^^`
			`\|`
			`= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!`
Fill in tracking issue 2024-07-04 10:52:01 -05:00			`= note: for more information, see issue #127323 <https://github.com/rust-lang/rust/issues/127323>`
Align the changes to the lang decision 2024-06-23 12:55:17 -05:00			= note: `#[warn(ptr_cast_add_auto_to_object)]` on by default
Add more checks for pointers with vtable meta The rules for casting `mut X<dyn A>` -> `mut Y<dyn B>` are as follows: - If `B` has a principal - `A` must have exactly the same principal (including generics) - Auto traits of `B` must be a subset of autotraits in `A` Note that `X<_>` and `Y<_>` can be identity, or arbitrary structs with last field being the dyn type. The lifetime of the trait object itself (`dyn ... + 'a`) is not checked. This prevents a few soundness issues with `#![feature(arbitrary_self_types)]` and trait upcasting. Namely, these checks make sure that vtable is always valid for the pointee. 2024-02-12 15:24:48 -06:00
Use `DiagSymbolList` for a lint diagnostic 2024-07-04 09:46:00 -05:00			`Future breakage diagnostic:`
Sort trait names before printing 2024-07-04 11:38:18 -05:00			warning: adding auto traits `Send`, `Sync`, and `Unpin` to a trait object in a pointer cast may cause UB later on
Use `DiagSymbolList` for a lint diagnostic 2024-07-04 09:46:00 -05:00			`--> $DIR/ptr-to-trait-obj-add-auto.rs:13:5`
			`\|`
			`LL \| x as _`
			`\| ^^^^^^`
			`\|`
			`= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!`
Fill in tracking issue 2024-07-04 10:52:01 -05:00			`= note: for more information, see issue #127323 <https://github.com/rust-lang/rust/issues/127323>`
Use `DiagSymbolList` for a lint diagnostic 2024-07-04 09:46:00 -05:00			= note: `#[warn(ptr_cast_add_auto_to_object)]` on by default