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Tracking import use types for more accurate redundant import checking fixes #117448 By tracking import use types to check whether it is scope uses or the other situations like module-relative uses, we can do more accurate redundant import checking. For example unnecessary imports in std::prelude that can be eliminated: ```rust use std::option::Option::Some;//~ WARNING the item `Some` is imported redundantly use std::option::Option::None; //~ WARNING the item `None` is imported redundantly ```
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- The bootstrapping build system
- Various submodules for tools, like cargo, tidy, etc.
For more information on how various parts of the compiler work, see the rustc dev guide.