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Nicholas Nethercote
a733192980
`rustc_hir_analysis` depends on `rustc_lint` in just a single function: `emit_delayed_lint`, which is used by the "emit_ast_lowering_delayed_lints" checking section within `rustc_hir_analysis::check_crate`. This commit moves that function and section to out of `rustc_hir_analysis::check_crate`, into `rustc_interface`, eliminating the dependency. This seems reasonable because the delayed lint errors aren't really related to HIR analysis. They were in there just because HIR analysis follows AST lowering. This means `rustc_hir_analysis` and `rustc_lint` can both start compiling as soon as `rustc_trait_selection` finishes. This also changes the error order in one test, which doesn't matter. The commit also changes `emit_delayed_lint` to `emit_delayed_lints`, factoring out some code duplicated in rustdoc.
For high-level intro to how type checking works in rustc, see the hir typeck chapter of the rustc dev guide.