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error[E0658]: `concat_idents` is not stable enough for use and is subject to change (see issue #29599)
--> $DIR/feature-gate-concat_idents2.rs:4:5
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LL | concat_idents!(a, b); //~ ERROR `concat_idents` is not stable enough
| ^^^^^^^^^^^^^^^^^^^^^
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= help: add #![feature(concat_idents)] to the crate attributes to enable
error[E0425]: cannot find value `ab` in this scope
--> $DIR/feature-gate-concat_idents2.rs:4:5
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LL | concat_idents!(a, b); //~ ERROR `concat_idents` is not stable enough
| ^^^^^^^^^^^^^^^^^^^^^ not found in this scope
error: aborting due to 2 previous errors
Some errors occurred: E0425, E0658.
For more information about an error, try `rustc --explain E0425`.
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