Rollup of 8 pull requests

Cargo.lock

@@ -3103,9 +3103,9 @@ dependencies = [
 
 [[package]]
 name = "mdbook"
-version = "0.4.25"
+version = "0.4.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d1ed28d5903dde77bd5182645078a37ee57014cac6ccb2d54e1d6496386648e4"
+checksum = "764dcbfc2e5f868bc1b566eb179dff1a06458fd0cff846aae2579392dd3f01a0"
 dependencies = [
  "ammonia",
  "anyhow",

compiler/rustc_codegen_ssa/src/mir/block.rs

@@ -1475,7 +1475,11 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
     ) -> OperandRef<'tcx, Bx::Value> {
         let tcx = bx.tcx();
 
-        let mut span_to_caller_location = |span: Span| {
+        let mut span_to_caller_location = |mut span: Span| {
+            // Remove `Inlined` marks as they pollute `expansion_cause`.
+            while span.is_inlined() {
+                span.remove_mark();
+            }
             let topmost = span.ctxt().outer_expn().expansion_cause().unwrap_or(span);
             let caller = tcx.sess.source_map().lookup_char_pos(topmost.lo());
             let const_loc = tcx.const_caller_location((

compiler/rustc_const_eval/src/interpret/intrinsics/caller_location.rs

@@ -111,7 +111,11 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
         location
     }
 
-    pub(crate) fn location_triple_for_span(&self, span: Span) -> (Symbol, u32, u32) {
+    pub(crate) fn location_triple_for_span(&self, mut span: Span) -> (Symbol, u32, u32) {
+        // Remove `Inlined` marks as they pollute `expansion_cause`.
+        while span.is_inlined() {
+            span.remove_mark();
+        }
         let topmost = span.ctxt().outer_expn().expansion_cause().unwrap_or(span);
         let caller = self.tcx.sess.source_map().lookup_char_pos(topmost.lo());
         (

compiler/rustc_hir_analysis/src/astconv/mod.rs

@@ -3152,8 +3152,12 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
 
         debug!("impl_trait_ty_to_ty: generics={:?}", generics);
         let substs = InternalSubsts::for_item(tcx, def_id, |param, _| {
-            if let Some(i) = (param.index as usize).checked_sub(generics.parent_count) {
-                // Our own parameters are the resolved lifetimes.
+            // We use `generics.count() - lifetimes.len()` here instead of `generics.parent_count`
+            // since return-position impl trait in trait squashes all of the generics from its source fn
+            // into its own generics, so the opaque's "own" params isn't always just lifetimes.
+            if let Some(i) = (param.index as usize).checked_sub(generics.count() - lifetimes.len())
+            {
+                // Resolve our own lifetime parameters.
                 let GenericParamDefKind::Lifetime { .. } = param.kind else { bug!() };
                 let hir::GenericArg::Lifetime(lifetime) = &lifetimes[i] else { bug!() };
                 self.ast_region_to_region(lifetime, None).into()

compiler/rustc_hir_analysis/src/collect/type_of.rs

@@ -278,8 +278,11 @@ pub(super) fn type_of(tcx: TyCtxt<'_>, def_id: DefId) -> ty::EarlyBinder<Ty<'_>>
             }
             TraitItemKind::Const(ty, body_id) => body_id
                 .and_then(|body_id| {
-                    is_suggestable_infer_ty(ty)
-                        .then(|| infer_placeholder_type(tcx, def_id, body_id, ty.span, item.ident, "constant",))
+                    is_suggestable_infer_ty(ty).then(|| {
+                        infer_placeholder_type(
+                            tcx, def_id, body_id, ty.span, item.ident, "constant",
+                        )
+                    })
                 })
                 .unwrap_or_else(|| icx.to_ty(ty)),
             TraitItemKind::Type(_, Some(ty)) => icx.to_ty(ty),
@@ -335,14 +338,15 @@ pub(super) fn type_of(tcx: TyCtxt<'_>, def_id: DefId) -> ty::EarlyBinder<Ty<'_>>
                     }
                 }
                 ItemKind::TyAlias(self_ty, _) => icx.to_ty(self_ty),
-                ItemKind::Impl(hir::Impl { self_ty, .. }) => {
-                    match self_ty.find_self_aliases() {
-                        spans if spans.len() > 0 => {
-                            let guar = tcx.sess.emit_err(crate::errors::SelfInImplSelf { span: spans.into(), note: () });
-                            tcx.ty_error(guar)
-                        },
-                        _ => icx.to_ty(*self_ty),
+                ItemKind::Impl(hir::Impl { self_ty, .. }) => match self_ty.find_self_aliases() {
+                    spans if spans.len() > 0 => {
+                        let guar = tcx.sess.emit_err(crate::errors::SelfInImplSelf {
+                            span: spans.into(),
+                            note: (),
+                        });
+                        tcx.ty_error(guar)
                     }
+                    _ => icx.to_ty(*self_ty),
                 },
                 ItemKind::Fn(..) => {
                     let substs = InternalSubsts::identity_for_item(tcx, def_id.to_def_id());
@@ -364,7 +368,10 @@ pub(super) fn type_of(tcx: TyCtxt<'_>, def_id: DefId) -> ty::EarlyBinder<Ty<'_>>
                     ..
                 }) => {
                     if in_trait && !tcx.impl_defaultness(owner).has_value() {
-                        span_bug!(tcx.def_span(def_id), "tried to get type of this RPITIT with no definition");
+                        span_bug!(
+                            tcx.def_span(def_id),
+                            "tried to get type of this RPITIT with no definition"
+                        );
                     }
                     find_opaque_ty_constraints_for_rpit(tcx, def_id, owner)
                 }
@@ -453,15 +460,12 @@ pub(super) fn type_of(tcx: TyCtxt<'_>, def_id: DefId) -> ty::EarlyBinder<Ty<'_>>
                     tcx.adt_def(tcx.hir().get_parent_item(hir_id)).repr().discr_type().to_ty(tcx)
                 }
 
-                Node::TypeBinding(
-                    TypeBinding {
-                        hir_id: binding_id,
-                        kind: TypeBindingKind::Equality { term: Term::Const(e) },
-                        ident,
-                        ..
-                    },
-                ) if let Node::TraitRef(trait_ref) =
-                    tcx.hir().get_parent(*binding_id)
+                Node::TypeBinding(TypeBinding {
+                    hir_id: binding_id,
+                    kind: TypeBindingKind::Equality { term: Term::Const(e) },
+                    ident,
+                    ..
+                }) if let Node::TraitRef(trait_ref) = tcx.hir().get_parent(*binding_id)
                     && e.hir_id == hir_id =>
                 {
                     let Some(trait_def_id) = trait_ref.trait_def_id() else {
@@ -475,7 +479,9 @@ pub(super) fn type_of(tcx: TyCtxt<'_>, def_id: DefId) -> ty::EarlyBinder<Ty<'_>>
                         def_id.to_def_id(),
                     );
                     if let Some(assoc_item) = assoc_item {
-                        tcx.type_of(assoc_item.def_id).subst_identity()
+                        tcx.type_of(assoc_item.def_id)
+                            .no_bound_vars()
+                            .expect("const parameter types cannot be generic")
                     } else {
                         // FIXME(associated_const_equality): add a useful error message here.
                         tcx.ty_error_with_message(
@@ -485,10 +491,13 @@ pub(super) fn type_of(tcx: TyCtxt<'_>, def_id: DefId) -> ty::EarlyBinder<Ty<'_>>
                     }
                 }
 
-                Node::TypeBinding(
-                    TypeBinding { hir_id: binding_id, gen_args, kind, ident, .. },
-                ) if let Node::TraitRef(trait_ref) =
-                    tcx.hir().get_parent(*binding_id)
+                Node::TypeBinding(TypeBinding {
+                    hir_id: binding_id,
+                    gen_args,
+                    kind,
+                    ident,
+                    ..
+                }) if let Node::TraitRef(trait_ref) = tcx.hir().get_parent(*binding_id)
                     && let Some((idx, _)) =
                         gen_args.args.iter().enumerate().find(|(_, arg)| {
                             if let GenericArg::Const(ct) = arg {
@@ -517,15 +526,18 @@ pub(super) fn type_of(tcx: TyCtxt<'_>, def_id: DefId) -> ty::EarlyBinder<Ty<'_>>
                         },
                         def_id.to_def_id(),
                     );
-                    if let Some(param)
-                        = assoc_item.map(|item| &tcx.generics_of(item.def_id).params[idx]).filter(|param| param.kind.is_ty_or_const())
+                    if let Some(assoc_item) = assoc_item
+                        && let param = &tcx.generics_of(assoc_item.def_id).params[idx]
+                        && matches!(param.kind, ty::GenericParamDefKind::Const { .. })
                     {
-                        tcx.type_of(param.def_id).subst_identity()
+                        tcx.type_of(param.def_id)
+                            .no_bound_vars()
+                            .expect("const parameter types cannot be generic")
                     } else {
                         // FIXME(associated_const_equality): add a useful error message here.
                         tcx.ty_error_with_message(
                             DUMMY_SP,
-                            "Could not find associated const on trait",
+                            "Could not find const param on associated item",
                         )
                     }
                 }

compiler/rustc_span/src/hygiene.rs

@@ -880,7 +880,7 @@ impl Span {
     pub fn fresh_expansion(self, expn_id: LocalExpnId) -> Span {
         HygieneData::with(|data| {
             self.with_ctxt(data.apply_mark(
-                SyntaxContext::root(),
+                self.ctxt(),
                 expn_id.to_expn_id(),
                 Transparency::Transparent,
             ))

compiler/rustc_ty_utils/src/assoc.rs

@@ -396,6 +396,8 @@ fn associated_type_for_impl_trait_in_impl(
     impl_assoc_ty.impl_defaultness(tcx.impl_defaultness(impl_fn_def_id));
 
     // Copy generics_of the trait's associated item but the impl as the parent.
+    // FIXME(-Zlower-impl-trait-in-trait-to-assoc-ty) resolves to the trait instead of the impl
+    // generics.
     impl_assoc_ty.generics_of({
         let trait_assoc_generics = tcx.generics_of(trait_assoc_def_id);
         let trait_assoc_parent_count = trait_assoc_generics.parent_count;
@@ -404,16 +406,10 @@ fn associated_type_for_impl_trait_in_impl(
         let parent_generics = tcx.generics_of(impl_def_id);
         let parent_count = parent_generics.parent_count + parent_generics.params.len();
 
-        let mut impl_fn_params = tcx.generics_of(impl_fn_def_id).params.clone();
-
         for param in &mut params {
-            param.index = param.index + parent_count as u32 + impl_fn_params.len() as u32
-                - trait_assoc_parent_count as u32;
+            param.index = param.index + parent_count as u32 - trait_assoc_parent_count as u32;
         }
 
-        impl_fn_params.extend(params);
-        params = impl_fn_params;
-
         let param_def_id_to_index =
             params.iter().map(|param| (param.def_id, param.index)).collect();
 

library/core/src/slice/iter.rs

@@ -132,9 +132,7 @@ iterator! {struct Iter -> *const T, &'a T, const, {/* no mut */}, {
         Self: Sized,
         F: FnMut(&Self::Item, &Self::Item) -> Option<Ordering>,
     {
-        self.as_slice().windows(2).all(|w| {
-            compare(&&w[0], &&w[1]).map(|o| o != Ordering::Greater).unwrap_or(false)
-        })
+        self.as_slice().is_sorted_by(|a, b| compare(&a, &b))
     }
 }}
 

library/core/src/slice/mod.rs

@@ -3822,7 +3822,7 @@ impl<T> [T] {
     where
         F: FnMut(&'a T, &'a T) -> Option<Ordering>,
     {
-        self.iter().is_sorted_by(|a, b| compare(*a, *b))
+        self.array_windows().all(|[a, b]| compare(a, b).map_or(false, Ordering::is_le))
     }
 
     /// Checks if the elements of this slice are sorted using the given key extraction function.

src/bootstrap/bootstrap_test.py

@@ -11,6 +11,7 @@
 from shutil import rmtree
 
 import bootstrap
+import configure
 
 
 class VerifyTestCase(unittest.TestCase):
@@ -74,12 +75,50 @@ def test_same_dates(self):
         self.assertFalse(self.build.program_out_of_date(self.rustc_stamp_path, self.key))
 
 
+class GenerateAndParseConfig(unittest.TestCase):
+    """Test that we can serialize and deserialize a config.toml file"""
+    def serialize_and_parse(self, args):
+        from io import StringIO
+
+        section_order, sections, targets = configure.parse_args(args)
+        buffer = StringIO()
+        configure.write_config_toml(buffer, section_order, targets, sections)
+        build = bootstrap.RustBuild()
+        build.config_toml = buffer.getvalue()
+
+        try:
+            import tomllib
+            # Verify this is actually valid TOML.
+            tomllib.loads(build.config_toml)
+        except ImportError:
+            print("warning: skipping TOML validation, need at least python 3.11", file=sys.stderr)
+        return build
+
+    def test_no_args(self):
+        build = self.serialize_and_parse([])
+        self.assertEqual(build.get_toml("changelog-seen"), '2')
+        self.assertIsNone(build.get_toml("llvm.download-ci-llvm"))
+
+    def test_set_section(self):
+        build = self.serialize_and_parse(["--set", "llvm.download-ci-llvm"])
+        self.assertEqual(build.get_toml("download-ci-llvm", section="llvm"), 'true')
+
+    def test_set_target(self):
+        build = self.serialize_and_parse(["--set", "target.x86_64-unknown-linux-gnu.cc=gcc"])
+        self.assertEqual(build.get_toml("cc", section="target.x86_64-unknown-linux-gnu"), 'gcc')
+
+    # Uncomment when #108928 is fixed.
+    # def test_set_top_level(self):
+    #     build = self.serialize_and_parse(["--set", "profile=compiler"])
+    #     self.assertEqual(build.get_toml("profile"), 'compiler')
+
 if __name__ == '__main__':
     SUITE = unittest.TestSuite()
     TEST_LOADER = unittest.TestLoader()
     SUITE.addTest(doctest.DocTestSuite(bootstrap))
     SUITE.addTests([
         TEST_LOADER.loadTestsFromTestCase(VerifyTestCase),
+        TEST_LOADER.loadTestsFromTestCase(GenerateAndParseConfig),
         TEST_LOADER.loadTestsFromTestCase(ProgramOutOfDate)])
 
     RUNNER = unittest.TextTestRunner(stream=sys.stdout, verbosity=2)