1 error[E0659]: `core` is ambiguous (name vs any other name during import resolution)
2 --> $DIR/issue-57539.rs:4:9
7 = note: `core` could refer to a built-in crate
8 = help: use `::core` to refer to this crate unambiguously
9 note: `core` could also refer to the module imported here
10 --> $DIR/issue-57539.rs:5:9
14 = help: use `self::core` to refer to this module unambiguously
16 error: aborting due to previous error
18 For more information about this error, try `rustc --explain E0659`.