Auto merge of rust-lang#120862 - matthiaskrgr:rollup-jzfab58, r=matthiaskrgr

Rollup of 6 pull requests

Successful merges:

 - rust-lang#120584 (For a rigid projection, recursively look at the self type's item bounds to fix the `associated_type_bounds` feature)
 - rust-lang#120596 ([rustdoc] Correctly generate path for non-local items in source code pages)
 - rust-lang#120629 (Move some test files)
 - rust-lang#120846 (Update jobserver-rs to 0.1.28)
 - rust-lang#120850 (ast_lowering: Fix regression in `use ::{}` imports.)
 - rust-lang#120853 (Avoid a collection and iteration on empty passes)

r? `@ghost`
`@rustbot` modify labels: rollup

Author: bors

Cargo.lock

@@ -2090,9 +2090,9 @@ dependencies = [
 
 [[package]]
 name = "jobserver"
-version = "0.1.27"
+version = "0.1.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8c37f63953c4c63420ed5fd3d6d398c719489b9f872b9fa683262f8edd363c7d"
+checksum = "ab46a6e9526ddef3ae7f787c06f0f2600639ba80ea3eade3d8e670a2230f51d6"
 dependencies = [
  "libc",
 ]

compiler/rustc_ast_lowering/src/item.rs

@@ -569,7 +569,12 @@ impl<'hir> LoweringContext<'_, 'hir> {
                     });
                 }
 
-                let path = if trees.is_empty() && !prefix.segments.is_empty() {
+                // Condition should match `build_reduced_graph_for_use_tree`.
+                let path = if trees.is_empty()
+                    && !(prefix.segments.is_empty()
+                        || prefix.segments.len() == 1
+                            && prefix.segments[0].ident.name == kw::PathRoot)
+                {
                     // For empty lists we need to lower the prefix so it is checked for things
                     // like stability later.
                     let res = self.lower_import_res(id, span);