bcb9226efb
Allow registering tool lints with `register_tool` Previously, there was no way to add a custom tool prefix, even if the tool itself had registered a lint: ```rust #![feature(register_tool)] #![register_tool(xyz)] #![warn(xyz::my_lint)] ``` ``` $ rustc unknown-lint.rs --crate-type lib error[E0710]: an unknown tool name found in scoped lint: `xyz::my_lint` --> unknown-lint.rs:3:9 | 3 | #![warn(xyz::my_lint)] | ^^^ ``` This allows opting-in to lints from other tools using `register_tool`. cc https://github.com/rust-lang/rust/issues/66079#issuecomment-788589193, ``@chorman0773`` r? ``@petrochenkov`` |
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