Rollup of 7 pull requests

compiler/rustc_ast_passes/src/errors.rs

@@ -77,13 +77,6 @@ pub struct ForbiddenLifetimeBound {
     pub spans: Vec<Span>,
 }
 
-#[derive(Diagnostic)]
-#[diag(ast_passes_forbidden_non_lifetime_param)]
-pub struct ForbiddenNonLifetimeParam {
-    #[primary_span]
-    pub spans: Vec<Span>,
-}
-
 #[derive(Diagnostic)]
 #[diag(ast_passes_fn_param_too_many)]
 pub struct FnParamTooMany {

compiler/rustc_infer/src/infer/error_reporting/note_and_explain.rs

@@ -139,7 +139,7 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> {
                                     tcx,
                                     generics,
                                     diag,
-                                    &format!("{}", proj.self_ty()),
+                                    &proj.self_ty().to_string(),
                                     &path,
                                     None,
                                     matching_span,
@@ -153,7 +153,7 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> {
                                     tcx,
                                     generics,
                                     diag,
-                                    &format!("{}", proj.self_ty()),
+                                    &proj.self_ty().to_string(),
                                     &path,
                                     None,
                                     matching_span,

compiler/rustc_middle/src/thir.rs

@@ -410,6 +410,10 @@ pub enum ExprKind<'tcx> {
     Return {
         value: Option<ExprId>,
     },
+    /// A `become` expression.
+    Become {
+        value: ExprId,
+    },
     /// An inline `const` block, e.g. `const {}`.
     ConstBlock {
         did: DefId,

compiler/rustc_middle/src/thir/visit.rs

@@ -100,6 +100,7 @@ pub fn walk_expr<'a, 'tcx: 'a, V: Visitor<'a, 'tcx>>(visitor: &mut V, expr: &Exp
                 visitor.visit_expr(&visitor.thir()[value])
             }
         }
+        Become { value } => visitor.visit_expr(&visitor.thir()[value]),
         ConstBlock { did: _, substs: _ } => {}
         Repeat { value, count: _ } => {
             visitor.visit_expr(&visitor.thir()[value]);

compiler/rustc_mir_build/src/build/expr/as_place.rs

@@ -549,6 +549,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
             | ExprKind::Break { .. }
             | ExprKind::Continue { .. }
             | ExprKind::Return { .. }
+            | ExprKind::Become { .. }
             | ExprKind::Literal { .. }
             | ExprKind::NamedConst { .. }
             | ExprKind::NonHirLiteral { .. }

compiler/rustc_mir_build/src/build/expr/as_rvalue.rs

@@ -532,6 +532,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
             | ExprKind::Break { .. }
             | ExprKind::Continue { .. }
             | ExprKind::Return { .. }
+            | ExprKind::Become { .. }
             | ExprKind::InlineAsm { .. }
             | ExprKind::PlaceTypeAscription { .. }
             | ExprKind::ValueTypeAscription { .. } => {

compiler/rustc_mir_build/src/build/expr/category.rs

@@ -82,7 +82,8 @@ impl Category {
             | ExprKind::Block { .. }
             | ExprKind::Break { .. }
             | ExprKind::Continue { .. }
-            | ExprKind::Return { .. } =>
+            | ExprKind::Return { .. }
+            | ExprKind::Become { .. } =>
             // FIXME(#27840) these probably want their own
             // category, like "nonterminating"
             {

compiler/rustc_mir_build/src/build/expr/into.rs

@@ -493,7 +493,10 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
                 block.unit()
             }
 
-            ExprKind::Continue { .. } | ExprKind::Break { .. } | ExprKind::Return { .. } => {
+            ExprKind::Continue { .. }
+            | ExprKind::Break { .. }
+            | ExprKind::Return { .. }
+            | ExprKind::Become { .. } => {
                 unpack!(block = this.stmt_expr(block, expr, None));
                 // No assign, as these have type `!`.
                 block.unit()

compiler/rustc_mir_build/src/build/expr/stmt.rs

@@ -99,6 +99,13 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
                 BreakableTarget::Return,
                 source_info,
             ),
+            // FIXME(explicit_tail_calls): properly lower tail calls here
+            ExprKind::Become { value } => this.break_scope(
+                block,
+                Some(&this.thir[value]),
+                BreakableTarget::Return,
+                source_info,
+            ),
             _ => {
                 assert!(
                     statement_scope.is_some(),

compiler/rustc_mir_build/src/check_unsafety.rs

@@ -316,6 +316,7 @@ impl<'a, 'tcx> Visitor<'a, 'tcx> for UnsafetyVisitor<'a, 'tcx> {
             | ExprKind::Closure { .. }
             | ExprKind::Continue { .. }
             | ExprKind::Return { .. }
+            | ExprKind::Become { .. }
             | ExprKind::Yield { .. }
             | ExprKind::Loop { .. }
             | ExprKind::Let { .. }

compiler/rustc_mir_build/src/thir/cx/expr.rs

@@ -694,12 +694,8 @@ impl<'tcx> Cx<'tcx> {
 
                 ExprKind::Repeat { value: self.mirror_expr(v), count: *count }
             }
-            hir::ExprKind::Ret(ref v) => ExprKind::Return { value: v.map(|v| self.mirror_expr(v)) },
-            hir::ExprKind::Become(call) => {
-                // FIXME(explicit_tail_calls): use `ExprKind::Become` once we implemented it
-                // Temporary transform `become` into a `return`, so we can write tests for code before this stage
-                ExprKind::Return { value: Some(self.mirror_expr(call)) }
-            }
+            hir::ExprKind::Ret(v) => ExprKind::Return { value: v.map(|v| self.mirror_expr(v)) },
+            hir::ExprKind::Become(call) => ExprKind::Become { value: self.mirror_expr(call) },
             hir::ExprKind::Break(dest, ref value) => match dest.target_id {
                 Ok(target_id) => ExprKind::Break {
                     label: region::Scope { id: target_id.local_id, data: region::ScopeData::Node },

compiler/rustc_mir_build/src/thir/print.rs

@@ -421,6 +421,12 @@ impl<'a, 'tcx> ThirPrinter<'a, 'tcx> {
 
                 print_indented!(self, "}", depth_lvl);
             }
+            Become { value } => {
+                print_indented!(self, "Become {", depth_lvl);
+                print_indented!(self, "value:", depth_lvl + 1);
+                self.print_expr(*value, depth_lvl + 2);
+                print_indented!(self, "}", depth_lvl);
+            }
             ConstBlock { did, substs } => {
                 print_indented!(self, "ConstBlock {", depth_lvl);
                 print_indented!(self, format!("did: {:?}", did), depth_lvl + 1);

compiler/rustc_mir_dataflow/src/framework/mod.rs

@@ -45,7 +45,7 @@ pub mod graphviz;
 pub mod lattice;
 mod visitor;
 
-pub use self::cursor::{ResultsClonedCursor, ResultsCursor, ResultsRefCursor};
+pub use self::cursor::{AnalysisResults, ResultsClonedCursor, ResultsCursor, ResultsRefCursor};
 pub use self::direction::{Backward, Direction, Forward};
 pub use self::engine::{Engine, EntrySets, Results, ResultsCloned};
 pub use self::lattice::{JoinSemiLattice, MeetSemiLattice};

compiler/rustc_mir_dataflow/src/lib.rs

@@ -27,10 +27,10 @@ pub use self::drop_flag_effects::{
     on_lookup_result_bits,
 };
 pub use self::framework::{
-    fmt, graphviz, lattice, visit_results, Analysis, AnalysisDomain, Backward, CallReturnPlaces,
-    CloneAnalysis, Direction, Engine, Forward, GenKill, GenKillAnalysis, JoinSemiLattice, Results,
-    ResultsCloned, ResultsClonedCursor, ResultsCursor, ResultsRefCursor, ResultsVisitable,
-    ResultsVisitor, SwitchIntEdgeEffects,
+    fmt, graphviz, lattice, visit_results, Analysis, AnalysisDomain, AnalysisResults, Backward,
+    CallReturnPlaces, CloneAnalysis, Direction, Engine, Forward, GenKill, GenKillAnalysis,
+    JoinSemiLattice, Results, ResultsCloned, ResultsClonedCursor, ResultsCursor, ResultsRefCursor,
+    ResultsVisitable, ResultsVisitor, SwitchIntEdgeEffects,
 };
 
 use self::move_paths::MoveData;

compiler/rustc_mir_transform/src/coverage/debug.rs

@@ -277,14 +277,7 @@ impl DebugCounters {
 
     pub fn add_counter(&mut self, counter_kind: &CoverageKind, some_block_label: Option<String>) {
         if let Some(counters) = &mut self.some_counters {
-            let id: ExpressionOperandId = match *counter_kind {
-                CoverageKind::Counter { id, .. } => id.into(),
-                CoverageKind::Expression { id, .. } => id.into(),
-                _ => bug!(
-                    "the given `CoverageKind` is not an counter or expression: {:?}",
-                    counter_kind
-                ),
-            };
+            let id = counter_kind.as_operand_id();
             counters
                 .try_insert(id, DebugCounter::new(counter_kind.clone(), some_block_label))
                 .expect("attempt to add the same counter_kind to DebugCounters more than once");
@@ -330,13 +323,7 @@ impl DebugCounters {
             }
         }
 
-        let id: ExpressionOperandId = match *counter_kind {
-            CoverageKind::Counter { id, .. } => id.into(),
-            CoverageKind::Expression { id, .. } => id.into(),
-            _ => {
-                bug!("the given `CoverageKind` is not an counter or expression: {:?}", counter_kind)
-            }
-        };
+        let id = counter_kind.as_operand_id();
         if self.some_counters.is_some() && (counter_format.block || !counter_format.id) {
             let counters = self.some_counters.as_ref().unwrap();
             if let Some(DebugCounter { some_block_label: Some(block_label), .. }) =

compiler/rustc_parse/messages.ftl

@@ -353,6 +353,7 @@ parse_int_literal_too_large = integer literal is too large
 
 parse_invalid_block_macro_segment = cannot use a `block` macro fragment here
     .label = the `block` fragment is within this context
+    .suggestion = wrap this in another block
 
 parse_invalid_char_in_escape = {parse_invalid_char_in_escape_msg}: `{$ch}`
     .label = {parse_invalid_char_in_escape_msg}

compiler/rustc_parse/src/errors.rs

@@ -333,6 +333,17 @@ pub(crate) struct InvalidBlockMacroSegment {
     pub span: Span,
     #[label]
     pub context: Span,
+    #[subdiagnostic]
+    pub wrap: WrapInExplicitBlock,
+}
+
+#[derive(Subdiagnostic)]
+#[multipart_suggestion(parse_suggestion, applicability = "machine-applicable")]
+pub(crate) struct WrapInExplicitBlock {
+    #[suggestion_part(code = "{{ ")]
+    pub lo: Span,
+    #[suggestion_part(code = " }}")]
+    pub hi: Span,
 }
 
 #[derive(Diagnostic)]

compiler/rustc_parse/src/parser/expr.rs

@@ -1013,9 +1013,15 @@ impl<'a> Parser<'a> {
     }
 
     fn error_unexpected_after_dot(&self) {
-        // FIXME Could factor this out into non_fatal_unexpected or something.
         let actual = pprust::token_to_string(&self.token);
-        self.sess.emit_err(errors::UnexpectedTokenAfterDot { span: self.token.span, actual });
+        let span = self.token.span;
+        let sm = self.sess.source_map();
+        let (span, actual) = match (&self.token.kind, self.subparser_name) {
+            (token::Eof, Some(_)) if let Ok(actual) = sm.span_to_snippet(sm.next_point(span)) =>
+                (span.shrink_to_hi(), actual.into()),
+            _ => (span, actual),
+        };
+        self.sess.emit_err(errors::UnexpectedTokenAfterDot { span, actual });
     }
 
     // We need an identifier or integer, but the next token is a float.
@@ -2186,6 +2192,10 @@ impl<'a> Parser<'a> {
             self.sess.emit_err(errors::InvalidBlockMacroSegment {
                 span: self.token.span,
                 context: lo.to(self.token.span),
+                wrap: errors::WrapInExplicitBlock {
+                    lo: self.token.span.shrink_to_lo(),
+                    hi: self.token.span.shrink_to_hi(),
+                },
             });
         }
 

compiler/rustc_ty_utils/src/consts.rs

@@ -241,7 +241,8 @@ fn recurse_build<'tcx>(
         ExprKind::Assign { .. } | ExprKind::AssignOp { .. } => {
             error(GenericConstantTooComplexSub::AssignNotSupported(node.span))?
         }
-        ExprKind::Closure { .. } | ExprKind::Return { .. } => {
+        // FIXME(explicit_tail_calls): maybe get `become` a new error
+        ExprKind::Closure { .. } | ExprKind::Return { .. } | ExprKind::Become { .. } => {
             error(GenericConstantTooComplexSub::ClosureAndReturnNotSupported(node.span))?
         }
         // let expressions imply control flow
@@ -337,6 +338,7 @@ impl<'a, 'tcx> IsThirPolymorphic<'a, 'tcx> {
             | thir::ExprKind::Break { .. }
             | thir::ExprKind::Continue { .. }
             | thir::ExprKind::Return { .. }
+            | thir::ExprKind::Become { .. }
             | thir::ExprKind::Array { .. }
             | thir::ExprKind::Tuple { .. }
             | thir::ExprKind::Adt(_)

src/bootstrap/bootstrap.py

@@ -1052,7 +1052,13 @@ def bootstrap(args):
 
     profile = RustBuild.get_toml_static(config_toml, 'profile')
     if profile is not None:
-        include_file = 'config.{}.toml'.format(profile)
+        # Allows creating alias for profile names, allowing
+        # profiles to be renamed while maintaining back compatibility
+        # Keep in sync with `profile_aliases` in config.rs
+        profile_aliases = {
+            "user": "dist"
+        }
+        include_file = 'config.{}.toml'.format(profile_aliases.get(profile) or profile)
         include_dir = os.path.join(rust_root, 'src', 'bootstrap', 'defaults')
         include_path = os.path.join(include_dir, include_file)
         # HACK: This works because `self.get_toml()` returns the first match it finds for a

src/bootstrap/bootstrap_test.py

@@ -98,7 +98,7 @@ class GenerateAndParseConfig(unittest.TestCase):
     def test_no_args(self):
         build = serialize_and_parse([])
         self.assertEqual(build.get_toml("changelog-seen"), '2')
-        self.assertEqual(build.get_toml("profile"), 'user')
+        self.assertEqual(build.get_toml("profile"), 'dist')
         self.assertIsNone(build.get_toml("llvm.download-ci-llvm"))
 
     def test_set_section(self):

src/bootstrap/config.rs

@@ -1129,6 +1129,14 @@ impl Config {
         };
 
         if let Some(include) = &toml.profile {
+            // Allows creating alias for profile names, allowing
+            // profiles to be renamed while maintaining back compatibility
+            // Keep in sync with `profile_aliases` in bootstrap.py
+            let profile_aliases = HashMap::from([("user", "dist")]);
+            let include = match profile_aliases.get(include.as_str()) {
+                Some(alias) => alias,
+                None => include.as_str(),
+            };
             let mut include_path = config.src.clone();
             include_path.push("src");
             include_path.push("bootstrap");

src/bootstrap/config/tests.rs

@@ -1,5 +1,8 @@
+use crate::config::TomlConfig;
+
 use super::{Config, Flags};
 use clap::CommandFactory;
+use serde::Deserialize;
 use std::{env, path::Path};
 
 fn parse(config: &str) -> Config {
@@ -159,3 +162,19 @@ fn override_toml_duplicate() {
         |&_| toml::from_str("changelog-seen = 0").unwrap(),
     );
 }
+
+#[test]
+fn profile_user_dist() {
+    fn get_toml(file: &Path) -> TomlConfig {
+        let contents = if file.ends_with("config.toml") {
+            "profile = \"user\"".to_owned()
+        } else {
+            assert!(file.ends_with("config.dist.toml"));
+            std::fs::read_to_string(dbg!(file)).unwrap()
+        };
+        toml::from_str(&contents)
+            .and_then(|table: toml::Value| TomlConfig::deserialize(table))
+            .unwrap()
+    }
+    Config::parse_inner(&["check".to_owned()], get_toml);
+}

src/bootstrap/configure.py

@@ -437,7 +437,7 @@ def parse_example_config(known_args, config):
         targets[target][0] = targets[target][0].replace("x86_64-unknown-linux-gnu", "'{}'".format(target) if "." in target else target)
 
     if 'profile' not in config:
-        set('profile', 'user', config)
+        set('profile', 'dist', config)
     configure_file(sections, top_level_keys, targets, config)
     return section_order, sections, targets