error[E0259]: the name `test_macros` is defined multiple times --> $DIR/shadow.rs:6:1 | LL | extern crate test_macros; | ------------------------- previous import of the extern crate `test_macros` here LL | #[macro_use] LL | extern crate test_macros; | ^^^^^^^^^^^^^^^^^^^^^^^^^ `test_macros` reimported here | = note: `test_macros` must be defined only once in the type namespace of this module error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0259`.