Auto merge of #140613 - matthiaskrgr:rollup-yag6z7w, r=matthiaskrgr

Rollup of 7 pull requests

Successful merges:

 - #138712 (resolve: Support imports of associated types and glob imports from traits)
 - #140395 (organize and extend forbidden target feature tests)
 - #140576 (Remove fragile equal-pointers-unequal tests.)
 - #140582 (Update sysinfo to `0.35.0` in bootstrap and `tools/opt-dist`)
 - #140595 (doc(std): fix typo lchown -> lchmod)
 - #140597 (zkvm: remove schmerik as target maintainer)
 - #140604 (yet another small borrowck cleanup )

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

Author: bors

Cargo.lock

@@ -744,7 +744,7 @@ dependencies = [
  "tracing-subscriber",
  "unified-diff",
  "walkdir",
- "windows 0.59.0",
+ "windows",
 ]
 
 [[package]]
@@ -2463,6 +2463,25 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "830b246a0e5f20af87141b25c173cd1b609bd7779a4617d6ec582abaf90870f3"
 
+[[package]]
+name = "objc2-core-foundation"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1c10c2894a6fed806ade6027bcd50662746363a9589d3ec9d9bef30a4e4bc166"
+dependencies = [
+ "bitflags",
+]
+
+[[package]]
+name = "objc2-io-kit"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "71c1c64d6120e51cd86033f67176b1cb66780c2efe34dec55176f77befd93c0a"
+dependencies = [
+ "libc",
+ "objc2-core-foundation",
+]
+
 [[package]]
 name = "object"
 version = "0.32.2"
@@ -3466,7 +3485,7 @@ dependencies = [
  "thorin-dwp",
  "tracing",
  "wasm-encoder 0.219.2",
- "windows 0.59.0",
+ "windows",
 ]
 
 [[package]]
@@ -3525,7 +3544,7 @@ dependencies = [
  "tempfile",
  "thin-vec",
  "tracing",
- "windows 0.59.0",
+ "windows",
 ]
 
 [[package]]
@@ -3588,7 +3607,7 @@ dependencies = [
  "serde_json",
  "shlex",
  "tracing",
- "windows 0.59.0",
+ "windows",
 ]
 
 [[package]]
@@ -3643,7 +3662,7 @@ dependencies = [
  "termcolor",
  "termize",
  "tracing",
- "windows 0.59.0",
+ "windows",
 ]
 
 [[package]]
@@ -4386,7 +4405,7 @@ dependencies = [
  "smallvec",
  "termize",
  "tracing",
- "windows 0.59.0",
+ "windows",
 ]
 
 [[package]]
@@ -5068,13 +5087,14 @@ dependencies = [
 
 [[package]]
 name = "sysinfo"
-version = "0.31.4"
+version = "0.35.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "355dbe4f8799b304b05e1b0f05fc59b2a18d36645cf169607da45bde2f69a1be"
+checksum = "b897c8ea620e181c7955369a31be5f48d9a9121cb59fd33ecef9ff2a34323422"
 dependencies = [
- "core-foundation-sys",
  "libc",
- "windows 0.57.0",
+ "objc2-core-foundation",
+ "objc2-io-kit",
+ "windows",
 ]
 
 [[package]]
@@ -5949,16 +5969,6 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
 
-[[package]]
-name = "windows"
-version = "0.57.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "12342cb4d8e3b046f3d80effd474a7a02447231330ef77d71daa6fbc40681143"
-dependencies = [
- "windows-core 0.57.0",
- "windows-targets 0.52.6",
-]
-
 [[package]]
 name = "windows"
 version = "0.59.0"
@@ -5980,27 +5990,15 @@ dependencies = [
  "serde_json",
 ]
 
-[[package]]
-name = "windows-core"
-version = "0.57.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d2ed2439a290666cd67ecce2b0ffaad89c2a56b976b736e6ece670297897832d"
-dependencies = [
- "windows-implement 0.57.0",
- "windows-interface 0.57.0",
- "windows-result 0.1.2",
- "windows-targets 0.52.6",
-]
-
 [[package]]
 name = "windows-core"
 version = "0.59.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "810ce18ed2112484b0d4e15d022e5f598113e220c53e373fb31e67e21670c1ce"
 dependencies = [
  "windows-implement 0.59.0",
- "windows-interface 0.59.1",
- "windows-result 0.3.2",
+ "windows-interface",
+ "windows-result",
  "windows-strings 0.3.1",
  "windows-targets 0.53.0",
 ]
@@ -6012,23 +6010,12 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4763c1de310c86d75a878046489e2e5ba02c649d185f21c67d4cf8a56d098980"
 dependencies = [
  "windows-implement 0.60.0",
- "windows-interface 0.59.1",
+ "windows-interface",
  "windows-link",
- "windows-result 0.3.2",
+ "windows-result",
  "windows-strings 0.4.0",
 ]
 
-[[package]]
-name = "windows-implement"
-version = "0.57.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9107ddc059d5b6fbfbffdfa7a7fe3e22a226def0b2608f72e9d552763d3e1ad7"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn 2.0.100",
-]
-
 [[package]]
 name = "windows-implement"
 version = "0.59.0"
@@ -6051,17 +6038,6 @@ dependencies = [
  "syn 2.0.100",
 ]
 
-[[package]]
-name = "windows-interface"
-version = "0.57.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "29bee4b38ea3cde66011baa44dba677c432a78593e202392d1e9070cf2a7fca7"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn 2.0.100",
-]
-
 [[package]]
 name = "windows-interface"
 version = "0.59.1"
@@ -6079,15 +6055,6 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "76840935b766e1b0a05c0066835fb9ec80071d4c09a16f6bd5f7e655e3c14c38"
 
-[[package]]
-name = "windows-result"
-version = "0.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5e383302e8ec8515204254685643de10811af0ed97ea37210dc26fb0032647f8"
-dependencies = [
- "windows-targets 0.52.6",
-]
-
 [[package]]
 name = "windows-result"
 version = "0.3.2"

compiler/rustc_borrowck/src/region_infer/reverse_sccs.rs

@@ -7,6 +7,8 @@ use rustc_middle::ty::RegionVid;
 
 use crate::RegionInferenceContext;
 use crate::constraints::ConstraintSccIndex;
+use crate::region_infer::ConstraintSccs;
+use crate::universal_regions::UniversalRegions;
 
 pub(crate) struct ReverseSccGraph {
     graph: VecGraph<ConstraintSccIndex>,
@@ -19,6 +21,29 @@ pub(crate) struct ReverseSccGraph {
 }
 
 impl ReverseSccGraph {
+    pub(super) fn compute(
+        constraint_sccs: &ConstraintSccs,
+        universal_regions: &UniversalRegions<'_>,
+    ) -> Self {
+        let graph = constraint_sccs.reverse();
+        let mut paired_scc_regions = universal_regions
+            .universal_regions_iter()
+            .map(|region| (constraint_sccs.scc(region), region))
+            .collect::<Vec<_>>();
+        paired_scc_regions.sort();
+        let universal_regions = paired_scc_regions.iter().map(|&(_, region)| region).collect();
+
+        let mut scc_regions = FxIndexMap::default();
+        let mut start = 0;
+        for chunk in paired_scc_regions.chunk_by(|&(scc1, _), &(scc2, _)| scc1 == scc2) {
+            let (scc, _) = chunk[0];
+
+            scc_regions.insert(scc, start..start + chunk.len());
+            start += chunk.len();
+        }
+        ReverseSccGraph { graph, scc_regions, universal_regions }
+    }
+
     /// Find all universal regions that are required to outlive the given SCC.
     pub(super) fn upper_bounds(&self, scc0: ConstraintSccIndex) -> impl Iterator<Item = RegionVid> {
         let mut duplicates = FxIndexSet::default();
@@ -40,23 +65,7 @@ impl RegionInferenceContext<'_> {
             return;
         }
 
-        let graph = self.constraint_sccs.reverse();
-        let mut paired_scc_regions = self
-            .universal_regions()
-            .universal_regions_iter()
-            .map(|region| (self.constraint_sccs.scc(region), region))
-            .collect::<Vec<_>>();
-        paired_scc_regions.sort();
-        let universal_regions = paired_scc_regions.iter().map(|&(_, region)| region).collect();
-
-        let mut scc_regions = FxIndexMap::default();
-        let mut start = 0;
-        for chunk in paired_scc_regions.chunk_by(|&(scc1, _), &(scc2, _)| scc1 == scc2) {
-            let (scc, _) = chunk[0];
-            scc_regions.insert(scc, start..start + chunk.len());
-            start += chunk.len();
-        }
-
-        self.rev_scc_graph = Some(ReverseSccGraph { graph, scc_regions, universal_regions });
+        self.rev_scc_graph =
+            Some(ReverseSccGraph::compute(&self.constraint_sccs, self.universal_regions()));
     }
 }

compiler/rustc_borrowck/src/type_check/free_region_relations.rs

@@ -41,8 +41,8 @@ type NormalizedInputsAndOutput<'tcx> = Vec<Ty<'tcx>>;
 
 pub(crate) struct CreateResult<'tcx> {
     pub(crate) universal_region_relations: Frozen<UniversalRegionRelations<'tcx>>,
-    pub(crate) region_bound_pairs: RegionBoundPairs<'tcx>,
-    pub(crate) known_type_outlives_obligations: Vec<ty::PolyTypeOutlivesPredicate<'tcx>>,
+    pub(crate) region_bound_pairs: Frozen<RegionBoundPairs<'tcx>>,
+    pub(crate) known_type_outlives_obligations: Frozen<Vec<ty::PolyTypeOutlivesPredicate<'tcx>>>,
     pub(crate) normalized_inputs_and_output: NormalizedInputsAndOutput<'tcx>,
 }
 
@@ -333,8 +333,8 @@ impl<'tcx> UniversalRegionRelationsBuilder<'_, 'tcx> {
                 outlives: self.outlives.freeze(),
                 inverse_outlives: self.inverse_outlives.freeze(),
             }),
-            known_type_outlives_obligations,
-            region_bound_pairs: self.region_bound_pairs,
+            known_type_outlives_obligations: Frozen::freeze(known_type_outlives_obligations),
+            region_bound_pairs: Frozen::freeze(self.region_bound_pairs),
             normalized_inputs_and_output,
         }
     }

compiler/rustc_borrowck/src/type_check/mod.rs

@@ -151,8 +151,8 @@ pub(crate) fn type_check<'a, 'tcx>(
         body,
         promoted,
         user_type_annotations: &body.user_type_annotations,
-        region_bound_pairs,
-        known_type_outlives_obligations,
+        region_bound_pairs: &region_bound_pairs,
+        known_type_outlives_obligations: &known_type_outlives_obligations,
         reported_errors: Default::default(),
         universal_regions: &universal_region_relations.universal_regions,
         location_table,
@@ -216,8 +216,8 @@ struct TypeChecker<'a, 'tcx> {
     /// User type annotations are shared between the main MIR and the MIR of
     /// all of the promoted items.
     user_type_annotations: &'a CanonicalUserTypeAnnotations<'tcx>,
-    region_bound_pairs: RegionBoundPairs<'tcx>,
-    known_type_outlives_obligations: Vec<ty::PolyTypeOutlivesPredicate<'tcx>>,
+    region_bound_pairs: &'a RegionBoundPairs<'tcx>,
+    known_type_outlives_obligations: &'a [ty::PolyTypeOutlivesPredicate<'tcx>],
     reported_errors: FxIndexSet<(Ty<'tcx>, Span)>,
     universal_regions: &'a UniversalRegions<'tcx>,
     location_table: &'a PoloniusLocationTable,
@@ -412,9 +412,9 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
         constraint_conversion::ConstraintConversion::new(
             self.infcx,
             self.universal_regions,
-            &self.region_bound_pairs,
+            self.region_bound_pairs,
             self.infcx.param_env,
-            &self.known_type_outlives_obligations,
+            self.known_type_outlives_obligations,
             locations,
             locations.span(self.body),
             category,
@@ -2506,9 +2506,9 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
             constraint_conversion::ConstraintConversion::new(
                 self.infcx,
                 self.universal_regions,
-                &self.region_bound_pairs,
+                self.region_bound_pairs,
                 self.infcx.param_env,
-                &self.known_type_outlives_obligations,
+                self.known_type_outlives_obligations,
                 locations,
                 self.body.span,             // irrelevant; will be overridden.
                 ConstraintCategory::Boring, // same as above.

compiler/rustc_error_codes/src/error_codes/E0253.md

@@ -1,9 +1,13 @@
+#### Note: this error code is no longer emitted by the compiler.
+
 Attempt was made to import an unimportable type. This can happen when trying
 to import a type from a trait.
 
 Erroneous code example:
 
-```compile_fail,E0253
+```
+#![feature(import_trait_associated_functions)]
+
 mod foo {
     pub trait MyTrait {
         type SomeType;