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error: macro-expanded `extern crate` items cannot shadow names passed with `--extern`
--> tests/ui/crashes/ice-6255.rs:6:9
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LL | extern crate std as core;
| ^^^^^^^^^^^^^^^^^^^^^^^^^
...
LL | define_other_core!();
| -------------------- in this macro invocation
|
= note: this error originates in the macro `define_other_core` (in Nightly builds, run with -Z macro-backtrace for more info)
error[E0659]: `core` is ambiguous
--> tests/ui/crashes/ice-6255.rs:12:5
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LL | core::panic!();
| ^^^^ ambiguous name
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= note: ambiguous because of a conflict between a macro-expanded name and a less macro-expanded name from outer scope during import or macro resolution
= note: `core` could refer to a built-in crate
note: `core` could also refer to the crate imported here
--> tests/ui/crashes/ice-6255.rs:6:9
|
LL | extern crate std as core;
| ^^^^^^^^^^^^^^^^^^^^^^^^^
...
LL | define_other_core!();
| -------------------- in this macro invocation
= help: use `crate::core` to refer to this crate unambiguously
= note: this error originates in the macro `define_other_core` (in Nightly builds, run with -Z macro-backtrace for more info)
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0659`.
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