| error[E0658]: unions with non-`Copy` fields are unstable |
| --> $DIR/feature-gate-untagged_unions.rs:9:1 |
| | |
| LL | / union U3 { |
| LL | | a: String, |
| LL | | } |
| | |_^ |
| | |
| = note: see issue #55149 <https://github.com/rust-lang/rust/issues/55149> for more information |
| = help: add `#![feature(untagged_unions)]` to the crate attributes to enable |
| |
| error[E0658]: unions with non-`Copy` fields are unstable |
| --> $DIR/feature-gate-untagged_unions.rs:13:1 |
| | |
| LL | / union U4<T> { |
| LL | | a: T, |
| LL | | } |
| | |_^ |
| | |
| = note: see issue #55149 <https://github.com/rust-lang/rust/issues/55149> for more information |
| = help: add `#![feature(untagged_unions)]` to the crate attributes to enable |
| |
| error[E0658]: unions with `Drop` implementations are unstable |
| --> $DIR/feature-gate-untagged_unions.rs:17:1 |
| | |
| LL | / union U5 { |
| LL | | a: u8, |
| LL | | } |
| | |_^ |
| | |
| = note: see issue #55149 <https://github.com/rust-lang/rust/issues/55149> for more information |
| = help: add `#![feature(untagged_unions)]` to the crate attributes to enable |
| |
| error[E0740]: unions may not contain fields that need dropping |
| --> $DIR/feature-gate-untagged_unions.rs:10:5 |
| | |
| LL | a: String, |
| | ^^^^^^^^^ |
| | |
| note: `std::mem::ManuallyDrop` can be used to wrap the type |
| --> $DIR/feature-gate-untagged_unions.rs:10:5 |
| | |
| LL | a: String, |
| | ^^^^^^^^^ |
| |
| error[E0740]: unions may not contain fields that need dropping |
| --> $DIR/feature-gate-untagged_unions.rs:14:5 |
| | |
| LL | a: T, |
| | ^^^^ |
| | |
| note: `std::mem::ManuallyDrop` can be used to wrap the type |
| --> $DIR/feature-gate-untagged_unions.rs:14:5 |
| | |
| LL | a: T, |
| | ^^^^ |
| |
| error: aborting due to 5 previous errors |
| |
| Some errors have detailed explanations: E0658, E0740. |
| For more information about an error, try `rustc --explain E0658`. |