error[E0710]: unknown tool name `abc` found in scoped lint: `abc::my_lint` --> $DIR/register-tool-lint.rs:5:9 | LL | #![warn(abc::my_lint)] | ^^^ | = help: add `#![register_tool(abc)]` to the crate root error[E0710]: unknown tool name `abc` found in scoped lint: `abc::my_lint` --> $DIR/register-tool-lint.rs:5:9 | LL | #![warn(abc::my_lint)] | ^^^ | = help: add `#![register_tool(abc)]` to the crate root = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0710`.