1error[E0259]: the name `core` is defined multiple times
2  --> $DIR/no-std-inject.rs:3:1
3   |
4LL | extern crate core;
5   | ^^^^^^^^^^^^^^^^^^ `core` reimported here
6   |
7   = note: `core` must be defined only once in the type namespace of this module
8help: you can use `as` to change the binding name of the import
9   |
10LL | extern crate core as other_core;
11   | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
12
13error: aborting due to previous error
14
15For more information about this error, try `rustc --explain E0259`.
16