Auto merge of rust-lang#100516 - compiler-errors:rollup-fgrfeb3, r=compiler-errors

Rollup of 8 pull requests

Successful merges:

 - rust-lang#99646 (Only point out a single function parameter if we have a single arg incompatibility)
 - rust-lang#100299 (make `clean::Item::span` return `Option` instead of dummy span)
 - rust-lang#100335 (Rustdoc-Json: Add `Path` type for traits.)
 - rust-lang#100367 (Suggest the path separator when a dot is used on a trait)
 - rust-lang#100431 (Enum variant ctor inherits the stability of the enum variant)
 - rust-lang#100446 (Suggest removing a semicolon after impl/trait items)
 - rust-lang#100468 (Use an extensionless `x` script for non-Windows)
 - rust-lang#100479 (Argument type error improvements)

Failed merges:

 - rust-lang#100483 (Point to generic or arg if it's the self type of unsatisfied projection predicate)

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

Author: bors

Diff for: compiler/rustc_infer/src/infer/error_reporting/mod.rs

@@ -1424,7 +1424,7 @@ impl<'a, 'tcx> InferCtxt<'a, 'tcx> {
     /// E0271, like `src/test/ui/issues/issue-39970.stderr`.
     #[tracing::instrument(
         level = "debug",
-        skip(self, diag, secondary_span, swap_secondary_and_primary, force_label)
+        skip(self, diag, secondary_span, swap_secondary_and_primary, prefer_label)
     )]
     pub fn note_type_err(
         &self,
@@ -1434,7 +1434,7 @@ impl<'a, 'tcx> InferCtxt<'a, 'tcx> {
         mut values: Option<ValuePairs<'tcx>>,
         terr: &TypeError<'tcx>,
         swap_secondary_and_primary: bool,
-        force_label: bool,
+        prefer_label: bool,
     ) {
         let span = cause.span();
 
@@ -1612,7 +1612,7 @@ impl<'a, 'tcx> InferCtxt<'a, 'tcx> {
             TypeError::ObjectUnsafeCoercion(_) => {}
             _ => {
                 let mut label_or_note = |span: Span, msg: &str| {
-                    if force_label || &[span] == diag.span.primary_spans() {
+                    if (prefer_label && is_simple_error) || &[span] == diag.span.primary_spans() {
                         diag.span_label(span, msg);
                     } else {
                         diag.span_note(span, msg);

Diff for: compiler/rustc_parse/src/parser/expr.rs

@@ -2268,7 +2268,7 @@ impl<'a> Parser<'a> {
                     attrs: attrs.into(),
                     ty,
                     pat,
-                    span: lo.to(this.token.span),
+                    span: lo.to(this.prev_token.span),
                     id: DUMMY_NODE_ID,
                     is_placeholder: false,
                 },

Diff for: compiler/rustc_parse/src/parser/item.rs

@@ -675,14 +675,44 @@ impl<'a> Parser<'a> {
             }
             match parse_item(self) {
                 Ok(None) => {
+                    let is_unnecessary_semicolon = !items.is_empty()
+                        // When the close delim is `)` in a case like the following, `token.kind` is expected to be `token::CloseDelim(Delimiter::Parenthesis)`,
+                        // but the actual `token.kind` is `token::CloseDelim(Delimiter::Bracket)`.
+                        // This is because the `token.kind` of the close delim is treated as the same as
+                        // that of the open delim in `TokenTreesReader::parse_token_tree`, even if the delimiters of them are different.
+                        // Therefore, `token.kind` should not be compared here.
+                        //
+                        // issue-60075.rs
+                        // ```
+                        // trait T {
+                        //     fn qux() -> Option<usize> {
+                        //         let _ = if true {
+                        //         });
+                        //          ^ this close delim
+                        //         Some(4)
+                        //     }
+                        // ```
+                        && self
+                            .span_to_snippet(self.prev_token.span)
+                            .map_or(false, |snippet| snippet == "}")
+                        && self.token.kind == token::Semi;
+                    let semicolon_span = self.token.span;
                     // We have to bail or we'll potentially never make progress.
                     let non_item_span = self.token.span;
                     self.consume_block(Delimiter::Brace, ConsumeClosingDelim::Yes);
-                    self.struct_span_err(non_item_span, "non-item in item list")
-                        .span_label(open_brace_span, "item list starts here")
+                    let mut err = self.struct_span_err(non_item_span, "non-item in item list");
+                    err.span_label(open_brace_span, "item list starts here")
                         .span_label(non_item_span, "non-item starts here")
-                        .span_label(self.prev_token.span, "item list ends here")
-                        .emit();
+                        .span_label(self.prev_token.span, "item list ends here");
+                    if is_unnecessary_semicolon {
+                        err.span_suggestion(
+                            semicolon_span,
+                            "consider removing this semicolon",
+                            "",
+                            Applicability::MaybeIncorrect,
+                        );
+                    }
+                    err.emit();
                     break;
                 }
                 Ok(Some(item)) => items.extend(item),

Diff for: compiler/rustc_passes/src/stability.rs

@@ -460,7 +460,7 @@ impl<'a, 'tcx> Visitor<'tcx> for Annotator<'a, 'tcx> {
                         AnnotationKind::Required,
                         InheritDeprecation::Yes,
                         InheritConstStability::No,
-                        InheritStability::No,
+                        InheritStability::Yes,
                         |_| {},
                     );
                 }
@@ -600,6 +600,9 @@ impl<'tcx> Visitor<'tcx> for MissingStabilityAnnotations<'tcx> {
 
     fn visit_variant(&mut self, var: &'tcx Variant<'tcx>) {
         self.check_missing_stability(self.tcx.hir().local_def_id(var.id), var.span);
+        if let Some(ctor_hir_id) = var.data.ctor_hir_id() {
+            self.check_missing_stability(self.tcx.hir().local_def_id(ctor_hir_id), var.span);
+        }
         intravisit::walk_variant(self, var);
     }
 

Diff for: compiler/rustc_resolve/src/late/diagnostics.rs

@@ -985,27 +985,45 @@ impl<'a: 'ast, 'ast> LateResolutionVisitor<'a, '_, 'ast> {
         let ns = source.namespace();
         let is_expected = &|res| source.is_expected(res);
 
-        let path_sep = |err: &mut Diagnostic, expr: &Expr| match expr.kind {
-            ExprKind::Field(_, ident) => {
+        let path_sep = |err: &mut Diagnostic, expr: &Expr, kind: DefKind| {
+            const MESSAGE: &str = "use the path separator to refer to an item";
+
+            let (lhs_span, rhs_span) = match &expr.kind {
+                ExprKind::Field(base, ident) => (base.span, ident.span),
+                ExprKind::MethodCall(_, receiver, _, span) => (receiver.span, *span),
+                _ => return false,
+            };
+
+            if lhs_span.eq_ctxt(rhs_span) {
                 err.span_suggestion(
-                    expr.span,
-                    "use the path separator to refer to an item",
-                    format!("{}::{}", path_str, ident),
+                    lhs_span.between(rhs_span),
+                    MESSAGE,
+                    "::",
                     Applicability::MaybeIncorrect,
                 );
                 true
-            }
-            ExprKind::MethodCall(ref segment, ..) => {
-                let span = expr.span.with_hi(segment.ident.span.hi());
-                err.span_suggestion(
-                    span,
-                    "use the path separator to refer to an item",
-                    format!("{}::{}", path_str, segment.ident),
+            } else if kind == DefKind::Struct
+            && let Some(lhs_source_span) = lhs_span.find_ancestor_inside(expr.span)
+            && let Ok(snippet) = self.r.session.source_map().span_to_snippet(lhs_source_span)
+            {
+                // The LHS is a type that originates from a macro call.
+                // We have to add angle brackets around it.
+
+                err.span_suggestion_verbose(
+                    lhs_source_span.until(rhs_span),
+                    MESSAGE,
+                    format!("<{snippet}>::"),
                     Applicability::MaybeIncorrect,
                 );
                 true
+            } else {
+                // Either we were unable to obtain the source span / the snippet or
+                // the LHS originates from a macro call and it is not a type and thus
+                // there is no way to replace `.` with `::` and still somehow suggest
+                // valid Rust code.
+
+                false
             }
-            _ => false,
         };
 
         let find_span = |source: &PathSource<'_>, err: &mut Diagnostic| {
@@ -1027,7 +1045,7 @@ impl<'a: 'ast, 'ast> LateResolutionVisitor<'a, '_, 'ast> {
             match source {
                 PathSource::Expr(Some(
                     parent @ Expr { kind: ExprKind::Field(..) | ExprKind::MethodCall(..), .. },
-                )) if path_sep(err, &parent) => {}
+                )) if path_sep(err, &parent, DefKind::Struct) => {}
                 PathSource::Expr(
                     None
                     | Some(Expr {
@@ -1143,8 +1161,11 @@ impl<'a: 'ast, 'ast> LateResolutionVisitor<'a, '_, 'ast> {
                     }
                 }
             }
-            (Res::Def(DefKind::Mod, _), PathSource::Expr(Some(parent))) => {
-                if !path_sep(err, &parent) {
+            (
+                Res::Def(kind @ (DefKind::Mod | DefKind::Trait), _),
+                PathSource::Expr(Some(parent)),
+            ) => {
+                if !path_sep(err, &parent, kind) {
                     return false;
                 }
             }

Diff for: compiler/rustc_typeck/src/check/fn_ctxt/checks.rs

@@ -440,30 +440,29 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         call_expr: &hir::Expr<'tcx>,
     ) {
         // Next, let's construct the error
-        let (error_span, full_call_span, ctor_of) = match &call_expr.kind {
+        let (error_span, full_call_span, ctor_of, is_method) = match &call_expr.kind {
             hir::ExprKind::Call(
                 hir::Expr { hir_id, span, kind: hir::ExprKind::Path(qpath), .. },
                 _,
             ) => {
                 if let Res::Def(DefKind::Ctor(of, _), _) =
                     self.typeck_results.borrow().qpath_res(qpath, *hir_id)
                 {
-                    (call_span, *span, Some(of))
+                    (call_span, *span, Some(of), false)
                 } else {
-                    (call_span, *span, None)
+                    (call_span, *span, None, false)
                 }
             }
-            hir::ExprKind::Call(hir::Expr { span, .. }, _) => (call_span, *span, None),
+            hir::ExprKind::Call(hir::Expr { span, .. }, _) => (call_span, *span, None, false),
             hir::ExprKind::MethodCall(path_segment, _, span) => {
                 let ident_span = path_segment.ident.span;
                 let ident_span = if let Some(args) = path_segment.args {
                     ident_span.with_hi(args.span_ext.hi())
                 } else {
                     ident_span
                 };
-                (
-                    *span, ident_span, None, // methods are never ctors
-                )
+                // methods are never ctors
+                (*span, ident_span, None, true)
             }
             k => span_bug!(call_span, "checking argument types on a non-call: `{:?}`", k),
         };
@@ -545,7 +544,9 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
             let coerced_ty = expectation.only_has_type(self).unwrap_or(formal_input_ty);
             let can_coerce = self.can_coerce(arg_ty, coerced_ty);
             if !can_coerce {
-                return Compatibility::Incompatible(None);
+                return Compatibility::Incompatible(Some(ty::error::TypeError::Sorts(
+                    ty::error::ExpectedFound::new(true, coerced_ty, arg_ty),
+                )));
             }
 
             // Using probe here, since we don't want this subtyping to affect inference.
@@ -659,7 +660,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                             Applicability::MachineApplicable,
                         );
                     };
-                    self.label_fn_like(&mut err, fn_def_id, callee_ty);
+                    self.label_fn_like(&mut err, fn_def_id, callee_ty, Some(mismatch_idx), is_method);
                     err.emit();
                     return;
                 }
@@ -701,16 +702,14 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         }
 
         errors.drain_filter(|error| {
-                let Error::Invalid(provided_idx, expected_idx, Compatibility::Incompatible(error)) = error else { return false };
+                let Error::Invalid(provided_idx, expected_idx, Compatibility::Incompatible(Some(e))) = error else { return false };
                 let (provided_ty, provided_span) = provided_arg_tys[*provided_idx];
                 let (expected_ty, _) = formal_and_expected_inputs[*expected_idx];
                 let cause = &self.misc(provided_span);
                 let trace = TypeTrace::types(cause, true, expected_ty, provided_ty);
-                if let Some(e) = error {
-                    if !matches!(trace.cause.as_failure_code(e), FailureCode::Error0308(_)) {
-                        self.report_and_explain_type_error(trace, e).emit();
-                        return true;
-                    }
+                if !matches!(trace.cause.as_failure_code(e), FailureCode::Error0308(_)) {
+                    self.report_and_explain_type_error(trace, e).emit();
+                    return true;
                 }
                 false
             });
@@ -749,7 +748,13 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                 format!("arguments to this {} are incorrect", call_name),
             );
             // Call out where the function is defined
-            self.label_fn_like(&mut err, fn_def_id, callee_ty);
+            self.label_fn_like(
+                &mut err,
+                fn_def_id,
+                callee_ty,
+                Some(expected_idx.as_usize()),
+                is_method,
+            );
             err.emit();
             return;
         }
@@ -1031,7 +1036,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         }
 
         // Call out where the function is defined
-        self.label_fn_like(&mut err, fn_def_id, callee_ty);
+        self.label_fn_like(&mut err, fn_def_id, callee_ty, None, is_method);
 
         // And add a suggestion block for all of the parameters
         let suggestion_text = match suggestion_text {
@@ -1781,6 +1786,9 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         err: &mut Diagnostic,
         callable_def_id: Option<DefId>,
         callee_ty: Option<Ty<'tcx>>,
+        // A specific argument should be labeled, instead of all of them
+        expected_idx: Option<usize>,
+        is_method: bool,
     ) {
         let Some(mut def_id) = callable_def_id else {
             return;
@@ -1881,14 +1889,30 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                 .get_if_local(def_id)
                 .and_then(|node| node.body_id())
                 .into_iter()
-                .flat_map(|id| self.tcx.hir().body(id).params);
+                .flat_map(|id| self.tcx.hir().body(id).params)
+                .skip(if is_method { 1 } else { 0 });
 
-            for param in params {
+            for (_, param) in params
+                .into_iter()
+                .enumerate()
+                .filter(|(idx, _)| expected_idx.map_or(true, |expected_idx| expected_idx == *idx))
+            {
                 spans.push_span_label(param.span, "");
             }
 
             let def_kind = self.tcx.def_kind(def_id);
             err.span_note(spans, &format!("{} defined here", def_kind.descr(def_id)));
+        } else if let Some(hir::Node::Expr(e)) = self.tcx.hir().get_if_local(def_id)
+            && let hir::ExprKind::Closure(hir::Closure { body, .. }) = &e.kind
+        {
+            let param = expected_idx
+                .and_then(|expected_idx| self.tcx.hir().body(*body).params.get(expected_idx));
+            let (kind, span) = if let Some(param) = param {
+                ("closure parameter", param.span)
+            } else {
+                ("closure", self.tcx.def_span(def_id))
+            };
+            err.span_note(span, &format!("{} defined here", kind));
         } else {
             let def_kind = self.tcx.def_kind(def_id);
             err.span_note(

Diff for: src/bootstrap/mk/Makefile.in

@@ -80,7 +80,7 @@ TESTS_IN_MINGW_2 := \
 	src/test/ui
 
 ci-mingw-subset-1:
-	$(Q)$(CFG_SRC_DIR)/x.sh test --stage 2 $(TESTS_IN_MINGW_2:%=--exclude %)
+	$(Q)$(CFG_SRC_DIR)/x test --stage 2 $(TESTS_IN_MINGW_2:%=--exclude %)
 ci-mingw-subset-2:
 	$(Q)$(BOOTSTRAP) test --stage 2 $(TESTS_IN_MINGW_2)
 

Diff for: src/ci/docker/host-x86_64/x86_64-gnu-llvm-12/Dockerfile

@@ -44,15 +44,15 @@ ENV RUST_CONFIGURE_ARGS \
       --enable-llvm-link-shared \
       --set rust.thin-lto-import-instr-limit=10
 
-# NOTE: intentionally uses all of `x.py`, `x.sh`, and `x.ps1` to make sure they all work on Linux.
+# NOTE: intentionally uses all of `x.py`, `x`, and `x.ps1` to make sure they all work on Linux.
 ENV SCRIPT ../x.py --stage 2 test --exclude src/tools/tidy && \
            # Run the `mir-opt` tests again but this time for a 32-bit target.
            # This enforces that tests using `// EMIT_MIR_FOR_EACH_BIT_WIDTH` have
            # both 32-bit and 64-bit outputs updated by the PR author, before
            # the PR is approved and tested for merging.
            # It will also detect tests lacking `// EMIT_MIR_FOR_EACH_BIT_WIDTH`,
            # despite having different output on 32-bit vs 64-bit targets.
-           ../x.sh --stage 2 test src/test/mir-opt \
+           ../x --stage 2 test src/test/mir-opt \
                              --host='' --target=i686-unknown-linux-gnu && \
            # Run the UI test suite again, but in `--pass=check` mode
            #