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error: malformed `cfg_attr` attribute input
--> $DIR/malformed-special-attrs.rs:1:1
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LL | #[cfg_attr]
| ^^^^^^^^^^^
|
= note: for more information, visit <https://doc.rust-lang.org/reference/conditional-compilation.html#the-cfg_attr-attribute>
help: missing condition and attribute
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LL | #[cfg_attr(condition, attribute, other_attribute, ...)]
| ++++++++++++++++++++++++++++++++++++++++++++
error: malformed `cfg_attr` attribute input
--> $DIR/malformed-special-attrs.rs:4:1
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LL | #[cfg_attr = ""]
| ^^^^^^^^^^^^^^^^
|
= note: for more information, visit <https://doc.rust-lang.org/reference/conditional-compilation.html#the-cfg_attr-attribute>
help: missing condition and attribute
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LL - #[cfg_attr = ""]
LL + #[cfg_attr(condition, attribute, other_attribute, ...)]
|
error: malformed `derive` attribute input
--> $DIR/malformed-special-attrs.rs:7:1
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LL | #[derive]
| ^^^^^^^^^ help: must be of the form: `#[derive(Trait1, Trait2, ...)]`
error: malformed `derive` attribute input
--> $DIR/malformed-special-attrs.rs:10:1
|
LL | #[derive = ""]
| ^^^^^^^^^^^^^^ help: must be of the form: `#[derive(Trait1, Trait2, ...)]`
error: aborting due to 4 previous errors
|
