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``` error: cannot find attribute `sede` in this scope --> $DIR/missing-derive-3.rs:20:7 | LL | #[sede(untagged)] | ^^^^ | help: the derive macros `Deserialize` and `Serialize` accept the similarly named `serde` attribute | LL | #[serde(untagged)] | + error: cannot find attribute `serde` in this scope --> $DIR/missing-derive-3.rs:14:7 | LL | #[serde(untagged)] | ^^^^^ | note: `serde` is imported here, but it is a crate, not an attribute --> $DIR/missing-derive-3.rs:4:1 | LL | extern crate serde; | ^^^^^^^^^^^^^^^^^^^ help: `serde` is an attribute that can be used by the derive macros `Deserialize` and `Serialize`, you might be missing a `derive` attribute | LL + #[derive(Deserialize, Serialize)] LL | enum B { | ```