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error[E0517]: attribute should be applied to a struct or union
--> $DIR/ice-const-prop-unions-known-panics-lint-123710.rs:6:8
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LL | #[repr(packed)]
| ^^^^^^
...
LL | / enum E {
LL | | A,
LL | | B,
LL | | C,
LL | | }
| |_- not a struct or union
error[E0740]: field must implement `Copy` or be wrapped in `ManuallyDrop<...>` to be used in a union
--> $DIR/ice-const-prop-unions-known-panics-lint-123710.rs:18:9
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LL | e: E,
| ^^^^
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= note: union fields must not have drop side-effects, which is currently enforced via either `Copy` or `ManuallyDrop<...>`
help: wrap the field type in `ManuallyDrop<...>`
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LL | e: std::mem::ManuallyDrop<E>,
| +++++++++++++++++++++++ +
error: aborting due to 2 previous errors
Some errors have detailed explanations: E0517, E0740.
For more information about an error, try `rustc --explain E0517`.
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