Auto merge of #53988 - eddyb:issue-53770, r=petrochenkov
rustc_resolve: only prepend CrateRoot to a non-keyword segment. Fixes #53770 by treating `use` paths as absolute in a finer-grained manner, specifically: ```rust use {a, crate::b, self::c, super::d}; ``` Used to be interpreted as if it were (when `uniform_paths` is not enabled): ```rust use ::{a, crate::b, self::c, super::d}; ``` With this PR, the `CrateRoot` pseudo-keyword indicating an absolute path is only inserted when the first path segment is found (if it's not a keyword), i.e. the example behaves like: ```rust use {::a, crate::b, self::c, super::d}; ``` This should (finally) make `use {path};` fully equivalent to `use path;`. r? @petrochenkov cc @cramertj @joshtriplett @nikomatsakis
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