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error[E0658]: the `#[rustc_intrinsic]` attribute is used to declare intrinsics as function items
--> $DIR/feature-gated-feature-in-macro-arg.rs:8:9
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LL | #[rustc_intrinsic]
| ^^^^^^^^^^^^^^^^^^
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= help: add `#![feature(intrinsics)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error[E0133]: call to unsafe function `main::atomic_fence` is unsafe and requires unsafe function or block
--> $DIR/feature-gated-feature-in-macro-arg.rs:11:9
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LL | atomic_fence();
| ^^^^^^^^^^^^^^ call to unsafe function
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= note: consult the function's documentation for information on how to avoid undefined behavior
error: aborting due to 2 previous errors
Some errors have detailed explanations: E0133, E0658.
For more information about an error, try `rustc --explain E0133`.
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