| error[E0539]: malformed `register_tool` attribute input | |
| --> $DIR/invalid-tool.rs:3:1 | |
| | | |
| LL | #![register_tool(1)] | |
| | ^^^^^^^^^^^^^^^^^-^^ | |
| | | | | |
| | | expected a valid identifier here | |
| | help: must be of the form: `#![register_tool(tool1, tool2, ...)]` | |
| error: aborting due to 1 previous error | |
| For more information about this error, try `rustc --explain E0539`. |