| An `export_name` attribute contains null characters (`\0`). | |
| Erroneous code example: | |
| ```compile_fail,E0648 | |
| #[export_name="\0foo"] // error: `export_name` may not contain null characters | |
| pub fn bar() {} | |
| ``` | |
| To fix this error, remove the null characters: | |
| ``` | |
| #[export_name="foo"] // ok! | |
| pub fn bar() {} | |
| ``` |