Merge pull request #4542 from rust-lang/rustup-2025-08-25

Automatic Rustup

26 files changed, 422 insertions, 110 deletions

diff --git a/compiler/rustc_attr_parsing/src/attributes/crate_level.rs b/compiler/rustc_attr_parsing/src/attributes/crate_level.rs
new file mode 100644
index 00000000000..9175d7479e1
--- /dev/null
+++ b/compiler/rustc_attr_parsing/src/attributes/crate_level.rs
@@ -0,0 +1,33 @@
+use super::prelude::*;
+
+pub(crate) struct CrateNameParser;
+
+impl<S: Stage> SingleAttributeParser<S> for CrateNameParser {
+    const PATH: &[Symbol] = &[sym::crate_name];
+    const ATTRIBUTE_ORDER: AttributeOrder = AttributeOrder::KeepOutermost;
+    const ON_DUPLICATE: OnDuplicate<S> = OnDuplicate::WarnButFutureError;
+    const TEMPLATE: AttributeTemplate = template!(NameValueStr: "name");
+
+    // FIXME: crate name is allowed on all targets and ignored,
+    //        even though it should only be valid on crates of course
+    const ALLOWED_TARGETS: AllowedTargets = AllowedTargets::AllowList(ALL_TARGETS);
+
+    fn convert(cx: &mut AcceptContext<'_, '_, S>, args: &ArgParser<'_>) -> Option<AttributeKind> {
+        let ArgParser::NameValue(n) = args else {
+            cx.expected_name_value(cx.attr_span, None);
+            return None;
+        };
+
+        let Some(name) = n.value_as_str() else {
+            cx.expected_string_literal(n.value_span, Some(n.value_as_lit()));
+            return None;
+        };
+
+        Some(AttributeKind::CrateName {
+            name,
+            name_span: n.value_span,
+            attr_span: cx.attr_span,
+            style: cx.attr_style,
+        })
+    }
+}
diff --git a/compiler/rustc_attr_parsing/src/attributes/mod.rs b/compiler/rustc_attr_parsing/src/attributes/mod.rs
index b98678041d7..9dad9c893f0 100644
--- a/compiler/rustc_attr_parsing/src/attributes/mod.rs
+++ b/compiler/rustc_attr_parsing/src/attributes/mod.rs
@@ -35,6 +35,7 @@ pub(crate) mod cfg;
 pub(crate) mod cfg_old;
 pub(crate) mod codegen_attrs;
 pub(crate) mod confusables;
+pub(crate) mod crate_level;
 pub(crate) mod deprecation;
 pub(crate) mod dummy;
 pub(crate) mod inline;
diff --git a/compiler/rustc_attr_parsing/src/attributes/util.rs b/compiler/rustc_attr_parsing/src/attributes/util.rs
index ef9701cb7cb..77e8c32e59d 100644
--- a/compiler/rustc_attr_parsing/src/attributes/util.rs
+++ b/compiler/rustc_attr_parsing/src/attributes/util.rs
@@ -1,5 +1,5 @@
 use rustc_ast::LitKind;
-use rustc_ast::attr::{AttributeExt, first_attr_value_str_by_name};
+use rustc_ast::attr::AttributeExt;
 use rustc_feature::is_builtin_attr_name;
 use rustc_hir::RustcVersion;
 use rustc_span::{Symbol, sym};
@@ -27,10 +27,6 @@ pub fn is_builtin_attr(attr: &impl AttributeExt) -> bool {
     attr.is_doc_comment() || attr.ident().is_some_and(|ident| is_builtin_attr_name(ident.name))
 }
 
-pub fn find_crate_name(attrs: &[impl AttributeExt]) -> Option<Symbol> {
-    first_attr_value_str_by_name(attrs, sym::crate_name)
-}
-
 pub fn is_doc_alias_attrs_contain_symbol<'tcx, T: AttributeExt + 'tcx>(
     attrs: impl Iterator<Item = &'tcx T>,
     symbol: Symbol,
diff --git a/compiler/rustc_attr_parsing/src/context.rs b/compiler/rustc_attr_parsing/src/context.rs
index bb701df6053..d4b9cfe00ad 100644
--- a/compiler/rustc_attr_parsing/src/context.rs
+++ b/compiler/rustc_attr_parsing/src/context.rs
@@ -5,7 +5,7 @@ use std::sync::LazyLock;
 
 use private::Sealed;
 use rustc_ast::{AttrStyle, MetaItemLit, NodeId};
-use rustc_errors::Diagnostic;
+use rustc_errors::{Diag, Diagnostic, Level};
 use rustc_feature::AttributeTemplate;
 use rustc_hir::attrs::AttributeKind;
 use rustc_hir::lints::{AttributeLint, AttributeLintKind};
@@ -24,6 +24,7 @@ use crate::attributes::codegen_attrs::{
     UsedParser,
 };
 use crate::attributes::confusables::ConfusablesParser;
+use crate::attributes::crate_level::CrateNameParser;
 use crate::attributes::deprecation::DeprecationParser;
 use crate::attributes::dummy::DummyParser;
 use crate::attributes::inline::{InlineParser, RustcForceInlineParser};
@@ -166,6 +167,7 @@ attribute_parsers!(
 
         // tidy-alphabetical-start
         Single<CoverageParser>,
+        Single<CrateNameParser>,
         Single<CustomMirParser>,
         Single<DeprecationParser>,
         Single<DummyParser>,
@@ -263,11 +265,7 @@ impl Stage for Early {
         sess: &'sess Session,
         diag: impl for<'x> Diagnostic<'x>,
     ) -> ErrorGuaranteed {
-        if self.emit_errors.should_emit() {
-            sess.dcx().emit_err(diag)
-        } else {
-            sess.dcx().create_err(diag).delay_as_bug()
-        }
+        self.should_emit().emit_err(sess.dcx().create_err(diag))
     }
 
     fn should_emit(&self) -> ShouldEmit {
@@ -314,7 +312,9 @@ pub struct AcceptContext<'f, 'sess, S: Stage> {
     /// The span of the attribute currently being parsed
     pub(crate) attr_span: Span,
 
+    /// Whether it is an inner or outer attribute
     pub(crate) attr_style: AttrStyle,
+
     /// The expected structure of the attribute.
     ///
     /// Used in reporting errors to give a hint to users what the attribute *should* look like.
@@ -333,7 +333,7 @@ impl<'f, 'sess: 'f, S: Stage> SharedContext<'f, 'sess, S> {
     /// must be delayed until after HIR is built. This method will take care of the details of
     /// that.
     pub(crate) fn emit_lint(&mut self, lint: AttributeLintKind, span: Span) {
-        if !self.stage.should_emit().should_emit() {
+        if matches!(self.stage.should_emit(), ShouldEmit::Nothing) {
             return;
         }
         let id = self.target_id;
@@ -651,8 +651,13 @@ pub enum OmitDoc {
     Skip,
 }
 
-#[derive(Copy, Clone)]
+#[derive(Copy, Clone, Debug)]
 pub enum ShouldEmit {
+    /// The operations will emit errors, and lints, and errors are fatal.
+    ///
+    /// Only relevant when early parsing, in late parsing equivalent to `ErrorsAndLints`.
+    /// Late parsing is never fatal, and instead tries to emit as many diagnostics as possible.
+    EarlyFatal,
     /// The operation will emit errors and lints.
     /// This is usually what you need.
     ErrorsAndLints,
@@ -662,10 +667,12 @@ pub enum ShouldEmit {
 }
 
 impl ShouldEmit {
-    pub fn should_emit(&self) -> bool {
+    pub(crate) fn emit_err(&self, diag: Diag<'_>) -> ErrorGuaranteed {
         match self {
-            ShouldEmit::ErrorsAndLints => true,
-            ShouldEmit::Nothing => false,
+            ShouldEmit::EarlyFatal if diag.level() == Level::DelayedBug => diag.emit(),
+            ShouldEmit::EarlyFatal => diag.upgrade_to_fatal().emit(),
+            ShouldEmit::ErrorsAndLints => diag.emit(),
+            ShouldEmit::Nothing => diag.delay_as_bug(),
         }
     }
 }
diff --git a/compiler/rustc_attr_parsing/src/interface.rs b/compiler/rustc_attr_parsing/src/interface.rs
index f652d39a708..60523c2877c 100644
--- a/compiler/rustc_attr_parsing/src/interface.rs
+++ b/compiler/rustc_attr_parsing/src/interface.rs
@@ -51,6 +51,27 @@ impl<'sess> AttributeParser<'sess, Early> {
         target_node_id: NodeId,
         features: Option<&'sess Features>,
     ) -> Option<Attribute> {
+        Self::parse_limited_should_emit(
+            sess,
+            attrs,
+            sym,
+            target_span,
+            target_node_id,
+            features,
+            ShouldEmit::Nothing,
+        )
+    }
+
+    /// Usually you want `parse_limited`, which defaults to no errors.
+    pub fn parse_limited_should_emit(
+        sess: &'sess Session,
+        attrs: &[ast::Attribute],
+        sym: Symbol,
+        target_span: Span,
+        target_node_id: NodeId,
+        features: Option<&'sess Features>,
+        should_emit: ShouldEmit,
+    ) -> Option<Attribute> {
         let mut parsed = Self::parse_limited_all(
             sess,
             attrs,
@@ -59,7 +80,7 @@ impl<'sess> AttributeParser<'sess, Early> {
             target_span,
             target_node_id,
             features,
-            ShouldEmit::Nothing,
+            should_emit,
         );
         assert!(parsed.len() <= 1);
         parsed.pop()
@@ -84,9 +105,8 @@ impl<'sess> AttributeParser<'sess, Early> {
             target,
             OmitDoc::Skip,
             std::convert::identity,
-            |_lint| {
-                // FIXME: Can't emit lints here for now
-                // This branch can be hit when an attribute produces a warning during early parsing (such as attributes on macro calls)
+            |lint| {
+                crate::lints::emit_attribute_lint(&lint, sess);
             },
         )
     }
@@ -121,8 +141,8 @@ impl<'sess> AttributeParser<'sess, Early> {
                 cx: &mut parser,
                 target_span,
                 target_id: target_node_id,
-                emit_lint: &mut |_lint| {
-                    panic!("can't emit lints here for now (nothing uses this atm)");
+                emit_lint: &mut |lint| {
+                    crate::lints::emit_attribute_lint(&lint, sess);
                 },
             },
             attr_span: attr.span,
@@ -252,7 +272,7 @@ impl<'sess, S: Stage> AttributeParser<'sess, S> {
 
                             (accept.accept_fn)(&mut cx, args);
 
-                            if self.stage.should_emit().should_emit() {
+                            if !matches!(self.stage.should_emit(), ShouldEmit::Nothing) {
                                 self.check_target(
                                     path.get_attribute_path(),
                                     attr.span,
diff --git a/compiler/rustc_attr_parsing/src/lib.rs b/compiler/rustc_attr_parsing/src/lib.rs
index 969c24a4f89..4dd908cdc40 100644
--- a/compiler/rustc_attr_parsing/src/lib.rs
+++ b/compiler/rustc_attr_parsing/src/lib.rs
@@ -106,9 +106,7 @@ pub mod validate_attr;
 
 pub use attributes::cfg::{CFG_TEMPLATE, EvalConfigResult, eval_config_entry, parse_cfg_attr};
 pub use attributes::cfg_old::*;
-pub use attributes::util::{
-    find_crate_name, is_builtin_attr, is_doc_alias_attrs_contain_symbol, parse_version,
-};
+pub use attributes::util::{is_builtin_attr, is_doc_alias_attrs_contain_symbol, parse_version};
 pub use context::{Early, Late, OmitDoc, ShouldEmit};
 pub use interface::AttributeParser;
 pub use lints::emit_attribute_lint;
diff --git a/compiler/rustc_attr_parsing/src/lints.rs b/compiler/rustc_attr_parsing/src/lints.rs
index 7030f28f23c..069478e7f0c 100644
--- a/compiler/rustc_attr_parsing/src/lints.rs
+++ b/compiler/rustc_attr_parsing/src/lints.rs
@@ -1,13 +1,13 @@
 use std::borrow::Cow;
 
 use rustc_errors::{DiagArgValue, LintEmitter};
+use rustc_hir::Target;
 use rustc_hir::lints::{AttributeLint, AttributeLintKind};
-use rustc_hir::{HirId, Target};
 use rustc_span::sym;
 
 use crate::session_diagnostics;
 
-pub fn emit_attribute_lint<L: LintEmitter>(lint: &AttributeLint<HirId>, lint_emitter: L) {
+pub fn emit_attribute_lint<L: LintEmitter>(lint: &AttributeLint<L::Id>, lint_emitter: L) {
     let AttributeLint { id, span, kind } = lint;
 
     match kind {
@@ -51,7 +51,7 @@ pub fn emit_attribute_lint<L: LintEmitter>(lint: &AttributeLint<HirId>, lint_emi
                 *id,
                 *span,
                 session_diagnostics::InvalidTargetLint {
-                    name,
+                    name: name.clone(),
                     target: target.plural_name(),
                     applied: DiagArgValue::StrListSepByAnd(
                         applied.into_iter().map(|i| Cow::Owned(i.to_string())).collect(),
diff --git a/compiler/rustc_attr_parsing/src/parser.rs b/compiler/rustc_attr_parsing/src/parser.rs
index 364f8819d13..6d3cf684296 100644
--- a/compiler/rustc_attr_parsing/src/parser.rs
+++ b/compiler/rustc_attr_parsing/src/parser.rs
@@ -328,15 +328,16 @@ fn expr_to_lit(
         match res {
             Ok(lit) => {
                 if token_lit.suffix.is_some() {
-                    psess
-                        .dcx()
-                        .create_err(SuffixedLiteralInAttribute { span: lit.span })
-                        .emit_unless_delay(!should_emit.should_emit());
+                    should_emit.emit_err(
+                        psess.dcx().create_err(SuffixedLiteralInAttribute { span: lit.span }),
+                    );
                     None
                 } else {
-                    if should_emit.should_emit() && !lit.kind.is_unsuffixed() {
+                    if !lit.kind.is_unsuffixed() {
                         // Emit error and continue, we can still parse the attribute as if the suffix isn't there
-                        psess.dcx().emit_err(SuffixedLiteralInAttribute { span: lit.span });
+                        should_emit.emit_err(
+                            psess.dcx().create_err(SuffixedLiteralInAttribute { span: lit.span }),
+                        );
                     }
 
                     Some(lit)
@@ -354,6 +355,10 @@ fn expr_to_lit(
             }
         }
     } else {
+        if matches!(should_emit, ShouldEmit::Nothing) {
+            return None;
+        }
+
         // Example cases:
         // - `#[foo = 1+1]`: results in `ast::ExprKind::BinOp`.
         // - `#[foo = include_str!("nonexistent-file.rs")]`:
@@ -361,12 +366,8 @@ fn expr_to_lit(
         //   the error because an earlier error will have already
         //   been reported.
         let msg = "attribute value must be a literal";
-        let mut err = psess.dcx().struct_span_err(span, msg);
-        if let ExprKind::Err(_) = expr.kind {
-            err.downgrade_to_delayed_bug();
-        }
-
-        err.emit_unless_delay(!should_emit.should_emit());
+        let err = psess.dcx().struct_span_err(span, msg);
+        should_emit.emit_err(err);
         None
     }
 }
@@ -397,9 +398,11 @@ impl<'a, 'sess> MetaItemListParserContext<'a, 'sess> {
             }
         };
 
-        if self.should_emit.should_emit() && !lit.kind.is_unsuffixed() {
+        if !lit.kind.is_unsuffixed() {
             // Emit error and continue, we can still parse the attribute as if the suffix isn't there
-            self.parser.dcx().emit_err(SuffixedLiteralInAttribute { span: lit.span });
+            self.should_emit.emit_err(
+                self.parser.dcx().create_err(SuffixedLiteralInAttribute { span: lit.span }),
+            );
         }
 
         Ok(lit)
@@ -539,7 +542,7 @@ impl<'a> MetaItemListParser<'a> {
         ) {
             Ok(s) => Some(s),
             Err(e) => {
-                e.emit_unless_delay(!should_emit.should_emit());
+                should_emit.emit_err(e);
                 None
             }
         }
diff --git a/compiler/rustc_attr_parsing/src/session_diagnostics.rs b/compiler/rustc_attr_parsing/src/session_diagnostics.rs
index 2192e8f8f83..72bee0ddfbf 100644
--- a/compiler/rustc_attr_parsing/src/session_diagnostics.rs
+++ b/compiler/rustc_attr_parsing/src/session_diagnostics.rs
@@ -484,9 +484,9 @@ pub(crate) struct EmptyAttributeList {
 #[diag(attr_parsing_invalid_target_lint)]
 #[warning]
 #[help]
-pub(crate) struct InvalidTargetLint<'a> {
-    pub name: &'a AttrPath,
-    pub target: &'a str,
+pub(crate) struct InvalidTargetLint {
+    pub name: AttrPath,
+    pub target: &'static str,
     pub applied: DiagArgValue,
     pub only: &'static str,
     #[suggestion(code = "", applicability = "machine-applicable", style = "tool-only")]
diff --git a/compiler/rustc_errors/Cargo.toml b/compiler/rustc_errors/Cargo.toml
index f37b6fb748f..7912b8e6098 100644
--- a/compiler/rustc_errors/Cargo.toml
+++ b/compiler/rustc_errors/Cargo.toml
@@ -14,7 +14,6 @@ rustc_error_codes = { path = "../rustc_error_codes" }
 rustc_error_messages = { path = "../rustc_error_messages" }
 rustc_fluent_macro = { path = "../rustc_fluent_macro" }
 rustc_hashes = { path = "../rustc_hashes" }
-rustc_hir_id = { path = "../rustc_hir_id" }
 rustc_index = { path = "../rustc_index" }
 rustc_lexer = { path = "../rustc_lexer" }
 rustc_lint_defs = { path = "../rustc_lint_defs" }
diff --git a/compiler/rustc_errors/src/diagnostic.rs b/compiler/rustc_errors/src/diagnostic.rs
index 43ce886975c..96a4ed3218f 100644
--- a/compiler/rustc_errors/src/diagnostic.rs
+++ b/compiler/rustc_errors/src/diagnostic.rs
@@ -577,6 +577,29 @@ impl<'a, G: EmissionGuarantee> Diag<'a, G> {
         self.level = Level::DelayedBug;
     }
 
+    /// Make emitting this diagnostic fatal
+    ///
+    /// Changes the level of this diagnostic to Fatal, and importantly also changes the emission guarantee.
+    /// This is sound for errors that would otherwise be printed, but now simply exit the process instead.
+    /// This function still gives an emission guarantee, the guarantee is now just that it exits fatally.
+    /// For delayed bugs this is different, since those are buffered. If we upgrade one to fatal, another
+    /// might now be ignored.
+    #[rustc_lint_diagnostics]
+    #[track_caller]
+    pub fn upgrade_to_fatal(mut self) -> Diag<'a, FatalAbort> {
+        assert!(
+            matches!(self.level, Level::Error),
+            "upgrade_to_fatal: cannot upgrade {:?} to Fatal: not an error",
+            self.level
+        );
+        self.level = Level::Fatal;
+
+        // Take is okay since we immediately rewrap it in another diagnostic.
+        // i.e. we do emit it despite defusing the original diagnostic's drop bomb.
+        let diag = self.diag.take();
+        Diag { dcx: self.dcx, diag, _marker: PhantomData }
+    }
+
     with_fn! { with_span_label,
     /// Appends a labeled span to the diagnostic.
     ///
diff --git a/compiler/rustc_errors/src/lib.rs b/compiler/rustc_errors/src/lib.rs
index 38c5716348f..71fc54f0d33 100644
--- a/compiler/rustc_errors/src/lib.rs
+++ b/compiler/rustc_errors/src/lib.rs
@@ -61,7 +61,6 @@ pub use rustc_error_messages::{
     fallback_fluent_bundle, fluent_bundle, into_diag_arg_using_display,
 };
 use rustc_hashes::Hash128;
-use rustc_hir_id::HirId;
 pub use rustc_lint_defs::{Applicability, listify, pluralize};
 use rustc_lint_defs::{Lint, LintExpectationId};
 use rustc_macros::{Decodable, Encodable};
@@ -110,13 +109,14 @@ rustc_data_structures::static_assert_size!(PResult<'_, bool>, 24);
 /// Used to avoid depending on `rustc_middle` in `rustc_attr_parsing`.
 /// Always the `TyCtxt`.
 pub trait LintEmitter: Copy {
+    type Id: Copy;
     #[track_caller]
     fn emit_node_span_lint(
         self,
         lint: &'static Lint,
-        hir_id: HirId,
+        hir_id: Self::Id,
         span: impl Into<MultiSpan>,
-        decorator: impl for<'a> LintDiagnostic<'a, ()>,
+        decorator: impl for<'a> LintDiagnostic<'a, ()> + DynSend + 'static,
     );
 }
 
diff --git a/compiler/rustc_hir/src/attrs/data_structures.rs b/compiler/rustc_hir/src/attrs/data_structures.rs
index 1e73bb6f5fd..09da5772d23 100644
--- a/compiler/rustc_hir/src/attrs/data_structures.rs
+++ b/compiler/rustc_hir/src/attrs/data_structures.rs
@@ -367,6 +367,9 @@ pub enum AttributeKind {
     /// Represents `#[coverage(..)]`.
     Coverage(Span, CoverageAttrKind),
 
+    /// Represents `#[crate_name = ...]`
+    CrateName { name: Symbol, name_span: Span, attr_span: Span, style: AttrStyle },
+
     /// Represents `#[custom_mir]`.
     CustomMir(Option<(MirDialect, Span)>, Option<(MirPhase, Span)>, Span),
 
diff --git a/compiler/rustc_hir/src/attrs/encode_cross_crate.rs b/compiler/rustc_hir/src/attrs/encode_cross_crate.rs
index 77c6faa7acd..e5329c104bb 100644
--- a/compiler/rustc_hir/src/attrs/encode_cross_crate.rs
+++ b/compiler/rustc_hir/src/attrs/encode_cross_crate.rs
@@ -7,6 +7,11 @@ pub enum EncodeCrossCrate {
 }
 
 impl AttributeKind {
+    /// Whether this attribute should be encoded in metadata files.
+    ///
+    /// If this is "Yes", then another crate can do `tcx.get_all_attrs(did)` for a did in this crate, and get the attribute.
+    /// When this is No, the attribute is filtered out while encoding and other crate won't be able to observe it.
+    /// This can be unexpectedly good for performance, so unless necessary for cross-crate compilation, prefer No.
     pub fn encode_cross_crate(&self) -> EncodeCrossCrate {
         use AttributeKind::*;
         use EncodeCrossCrate::*;
@@ -31,6 +36,7 @@ impl AttributeKind {
             ConstTrait(..) => No,
             Coroutine(..) => No,
             Coverage(..) => No,
+            CrateName { .. } => No,
             CustomMir(_, _, _) => Yes,
             DenyExplicitImpl(..) => No,
             Deprecation { .. } => Yes,
diff --git a/compiler/rustc_hir_typeck/src/method/probe.rs b/compiler/rustc_hir_typeck/src/method/probe.rs
index 3ca3b56b87e..f5c3ebd8375 100644
--- a/compiler/rustc_hir_typeck/src/method/probe.rs
+++ b/compiler/rustc_hir_typeck/src/method/probe.rs
@@ -909,6 +909,10 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> {
         debug_assert_matches!(param_ty.kind(), ty::Param(_));
 
         let tcx = self.tcx;
+
+        // We use `DeepRejectCtxt` here which may return false positive on where clauses
+        // with alias self types. We need to later on reject these as inherent candidates
+        // in `consider_probe`.
         let bounds = self.param_env.caller_bounds().iter().filter_map(|predicate| {
             let bound_predicate = predicate.kind();
             match bound_predicate.skip_binder() {
@@ -1945,6 +1949,29 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> {
                     );
                     (xform_self_ty, xform_ret_ty) =
                         self.xform_self_ty(probe.item, trait_ref.self_ty(), trait_ref.args);
+
+                    if matches!(probe.kind, WhereClauseCandidate(_)) {
+                        // `WhereClauseCandidate` requires that the self type is a param,
+                        // because it has special behavior with candidate preference as an
+                        // inherent pick.
+                        match ocx.structurally_normalize_ty(
+                            cause,
+                            self.param_env,
+                            trait_ref.self_ty(),
+                        ) {
+                            Ok(ty) => {
+                                if !matches!(ty.kind(), ty::Param(_)) {
+                                    debug!("--> not a param ty: {xform_self_ty:?}");
+                                    return ProbeResult::NoMatch;
+                                }
+                            }
+                            Err(errors) => {
+                                debug!("--> cannot relate self-types {:?}", errors);
+                                return ProbeResult::NoMatch;
+                            }
+                        }
+                    }
+
                     xform_self_ty = ocx.normalize(cause, self.param_env, xform_self_ty);
                     match ocx.relate(cause, self.param_env, self.variance(), self_ty, xform_self_ty)
                     {
diff --git a/compiler/rustc_interface/src/passes.rs b/compiler/rustc_interface/src/passes.rs
index 90f7ae76387..bc5ef04079e 100644
--- a/compiler/rustc_interface/src/passes.rs
+++ b/compiler/rustc_interface/src/passes.rs
@@ -6,7 +6,7 @@ use std::sync::{Arc, LazyLock, OnceLock};
 use std::{env, fs, iter};
 
 use rustc_ast as ast;
-use rustc_attr_parsing::validate_attr;
+use rustc_attr_parsing::{AttributeParser, ShouldEmit, validate_attr};
 use rustc_codegen_ssa::traits::CodegenBackend;
 use rustc_data_structures::jobserver::Proxy;
 use rustc_data_structures::steal::Steal;
@@ -16,6 +16,7 @@ use rustc_errors::timings::TimingSection;
 use rustc_expand::base::{ExtCtxt, LintStoreExpand};
 use rustc_feature::Features;
 use rustc_fs_util::try_canonicalize;
+use rustc_hir::attrs::AttributeKind;
 use rustc_hir::def_id::{LOCAL_CRATE, StableCrateId, StableCrateIdMap};
 use rustc_hir::definitions::Definitions;
 use rustc_incremental::setup_dep_graph;
@@ -1244,8 +1245,7 @@ pub fn get_crate_name(sess: &Session, krate_attrs: &[ast::Attribute]) -> Symbol
     // in all code paths that require the crate name very early on, namely before
     // macro expansion.
 
-    let attr_crate_name =
-        validate_and_find_value_str_builtin_attr(sym::crate_name, sess, krate_attrs);
+    let attr_crate_name = parse_crate_name(sess, krate_attrs, ShouldEmit::EarlyFatal);
 
     let validate = |name, span| {
         rustc_session::output::validate_crate_name(sess, name, span);
@@ -1283,6 +1283,28 @@ pub fn get_crate_name(sess: &Session, krate_attrs: &[ast::Attribute]) -> Symbol
     sym::rust_out
 }
 
+pub(crate) fn parse_crate_name(
+    sess: &Session,
+    attrs: &[ast::Attribute],
+    emit_errors: ShouldEmit,
+) -> Option<(Symbol, Span)> {
+    let rustc_hir::Attribute::Parsed(AttributeKind::CrateName { name, name_span, .. }) =
+        AttributeParser::parse_limited_should_emit(
+            sess,
+            &attrs,
+            sym::crate_name,
+            DUMMY_SP,
+            rustc_ast::node_id::CRATE_NODE_ID,
+            None,
+            emit_errors,
+        )?
+    else {
+        unreachable!("crate_name is the only attr we could've parsed here");
+    };
+
+    Some((name, name_span))
+}
+
 fn get_recursion_limit(krate_attrs: &[ast::Attribute], sess: &Session) -> Limit {
     // We don't permit macro calls inside of the attribute (e.g., #![recursion_limit = `expand!()`])
     // because that would require expanding this while in the middle of expansion, which needs to
diff --git a/compiler/rustc_interface/src/util.rs b/compiler/rustc_interface/src/util.rs
index 9a432a60819..04006f3e446 100644
--- a/compiler/rustc_interface/src/util.rs
+++ b/compiler/rustc_interface/src/util.rs
@@ -5,7 +5,7 @@ use std::sync::{Arc, OnceLock};
 use std::{env, thread};
 
 use rustc_ast as ast;
-use rustc_attr_parsing::validate_attr;
+use rustc_attr_parsing::{ShouldEmit, validate_attr};
 use rustc_codegen_ssa::traits::CodegenBackend;
 use rustc_data_structures::jobserver::Proxy;
 use rustc_data_structures::sync;
@@ -24,6 +24,7 @@ use rustc_target::spec::Target;
 use tracing::info;
 
 use crate::errors;
+use crate::passes::parse_crate_name;
 
 /// Function pointer type that constructs a new CodegenBackend.
 type MakeBackendFn = fn() -> Box<dyn CodegenBackend>;
@@ -520,11 +521,10 @@ pub fn build_output_filenames(attrs: &[ast::Attribute], sess: &Session) -> Outpu
         sess.dcx().emit_fatal(errors::MultipleOutputTypesToStdout);
     }
 
-    let crate_name = sess
-        .opts
-        .crate_name
-        .clone()
-        .or_else(|| rustc_attr_parsing::find_crate_name(attrs).map(|n| n.to_string()));
+    let crate_name =
+        sess.opts.crate_name.clone().or_else(|| {
+            parse_crate_name(sess, attrs, ShouldEmit::Nothing).map(|i| i.0.to_string())
+        });
 
     match sess.io.output_file {
         None => {
diff --git a/compiler/rustc_lint/messages.ftl b/compiler/rustc_lint/messages.ftl
index 940a07c94df..417e5a97069 100644
--- a/compiler/rustc_lint/messages.ftl
+++ b/compiler/rustc_lint/messages.ftl
@@ -462,6 +462,14 @@ lint_invalid_reference_casting_note_book = for more information, visit <https://
 
 lint_invalid_reference_casting_note_ty_has_interior_mutability = even for types with interior mutability, the only legal way to obtain a mutable pointer from a shared reference is through `UnsafeCell::get`
 
+lint_int_to_ptr_transmutes = transmuting an integer to a pointer creates a pointer without provenance
+    .note = this is dangerous because dereferencing the resulting pointer is undefined behavior
+    .note_exposed_provenance = exposed provenance semantics can be used to create a pointer based on some previously exposed provenance
+    .help_transmute = for more information about transmute, see <https://doc.rust-lang.org/std/mem/fn.transmute.html#transmutation-between-pointers-and-integers>
+    .help_exposed_provenance = for more information about exposed provenance, see <https://doc.rust-lang.org/std/ptr/index.html#exposed-provenance>
+    .suggestion_with_exposed_provenance = use `std::ptr::with_exposed_provenance{$suffix}` instead to use a previously exposed provenance
+    .suggestion_without_provenance_mut = if you truly mean to create a pointer without provenance, use `std::ptr::without_provenance_mut`
+
 lint_legacy_derive_helpers = derive helper attribute is used before it is introduced
     .label = the attribute is introduced here
 
diff --git a/compiler/rustc_lint/src/lifetime_syntax.rs b/compiler/rustc_lint/src/lifetime_syntax.rs
index 464f4fc34b9..413525eb6e5 100644
--- a/compiler/rustc_lint/src/lifetime_syntax.rs
+++ b/compiler/rustc_lint/src/lifetime_syntax.rs
@@ -214,9 +214,9 @@ impl<T> LifetimeSyntaxCategories<Vec<T>> {
         }
     }
 
-    pub fn flatten(&self) -> impl Iterator<Item = &T> {
-        let Self { hidden, elided, named } = self;
-        [hidden.iter(), elided.iter(), named.iter()].into_iter().flatten()
+    pub fn iter_unnamed(&self) -> impl Iterator<Item = &T> {
+        let Self { hidden, elided, named: _ } = self;
+        [hidden.iter(), elided.iter()].into_iter().flatten()
     }
 }
 
@@ -495,7 +495,7 @@ fn emit_mismatch_diagnostic<'tcx>(
 
     cx.emit_span_lint(
         MISMATCHED_LIFETIME_SYNTAXES,
-        inputs.flatten().copied().collect::<Vec<_>>(),
+        inputs.iter_unnamed().chain(outputs.iter_unnamed()).copied().collect::<Vec<_>>(),
         lints::MismatchedLifetimeSyntaxes { inputs, outputs, suggestions },
     );
 }
diff --git a/compiler/rustc_lint/src/lints.rs b/compiler/rustc_lint/src/lints.rs
index 6c509734626..426500dda4a 100644
--- a/compiler/rustc_lint/src/lints.rs
+++ b/compiler/rustc_lint/src/lints.rs
@@ -1,3 +1,5 @@
+// ignore-tidy-filelength
+
 #![allow(rustc::untranslatable_diagnostic)]
 use std::num::NonZero;
 
@@ -1542,6 +1544,48 @@ impl<'a> LintDiagnostic<'a, ()> for DropGlue<'_> {
     }
 }
 
+// transmute.rs
+#[derive(LintDiagnostic)]
+#[diag(lint_int_to_ptr_transmutes)]
+#[note]
+#[note(lint_note_exposed_provenance)]
+#[help(lint_suggestion_without_provenance_mut)]
+#[help(lint_help_transmute)]
+#[help(lint_help_exposed_provenance)]
+pub(crate) struct IntegerToPtrTransmutes<'tcx> {
+    #[subdiagnostic]
+    pub suggestion: IntegerToPtrTransmutesSuggestion<'tcx>,
+}
+
+#[derive(Subdiagnostic)]
+pub(crate) enum IntegerToPtrTransmutesSuggestion<'tcx> {
+    #[multipart_suggestion(
+        lint_suggestion_with_exposed_provenance,
+        applicability = "machine-applicable",
+        style = "verbose"
+    )]
+    ToPtr {
+        dst: Ty<'tcx>,
+        suffix: &'static str,
+        #[suggestion_part(code = "std::ptr::with_exposed_provenance{suffix}::<{dst}>(")]
+        start_call: Span,
+    },
+    #[multipart_suggestion(
+        lint_suggestion_with_exposed_provenance,
+        applicability = "machine-applicable",
+        style = "verbose"
+    )]
+    ToRef {
+        dst: Ty<'tcx>,
+        suffix: &'static str,
+        ref_mutbl: &'static str,
+        #[suggestion_part(
+            code = "&{ref_mutbl}*std::ptr::with_exposed_provenance{suffix}::<{dst}>("
+        )]
+        start_call: Span,
+    },
+}
+
 // types.rs
 #[derive(LintDiagnostic)]
 #[diag(lint_range_endpoint_out_of_range)]
diff --git a/compiler/rustc_lint/src/nonstandard_style.rs b/compiler/rustc_lint/src/nonstandard_style.rs
index 8fafaa33d0c..65075cfecfa 100644
--- a/compiler/rustc_lint/src/nonstandard_style.rs
+++ b/compiler/rustc_lint/src/nonstandard_style.rs
@@ -5,7 +5,7 @@ use rustc_hir::attrs::{AttributeKind, ReprAttr};
 use rustc_hir::def::{DefKind, Res};
 use rustc_hir::def_id::DefId;
 use rustc_hir::intravisit::{FnKind, Visitor};
-use rustc_hir::{AttrArgs, AttrItem, Attribute, GenericParamKind, PatExprKind, PatKind, find_attr};
+use rustc_hir::{Attribute, GenericParamKind, PatExprKind, PatKind, find_attr};
 use rustc_middle::hir::nested_filter::All;
 use rustc_middle::ty;
 use rustc_session::config::CrateType;
@@ -343,35 +343,27 @@ impl<'tcx> LateLintPass<'tcx> for NonSnakeCase {
         let crate_ident = if let Some(name) = &cx.tcx.sess.opts.crate_name {
             Some(Ident::from_str(name))
         } else {
-            ast::attr::find_by_name(cx.tcx.hir_attrs(hir::CRATE_HIR_ID), sym::crate_name).and_then(
-                |attr| {
-                    if let Attribute::Unparsed(n) = attr
-                        && let AttrItem { args: AttrArgs::Eq { eq_span: _, expr: lit }, .. } =
-                            n.as_ref()
-                        && let ast::LitKind::Str(name, ..) = lit.kind
-                    {
-                        // Discard the double quotes surrounding the literal.
-                        let sp = cx
-                            .sess()
-                            .source_map()
-                            .span_to_snippet(lit.span)
-                            .ok()
-                            .and_then(|snippet| {
-                                let left = snippet.find('"')?;
-                                let right = snippet.rfind('"').map(|pos| snippet.len() - pos)?;
-
-                                Some(
-                                    lit.span
-                                        .with_lo(lit.span.lo() + BytePos(left as u32 + 1))
-                                        .with_hi(lit.span.hi() - BytePos(right as u32)),
-                                )
-                            })
-                            .unwrap_or(lit.span);
-
-                        Some(Ident::new(name, sp))
-                    } else {
-                        None
-                    }
+            find_attr!(cx.tcx.hir_attrs(hir::CRATE_HIR_ID), AttributeKind::CrateName{name, name_span,..} => (name, name_span)).map(
+                |(&name, &span)| {
+                    // Discard the double quotes surrounding the literal.
+                    let sp = cx
+                        .sess()
+                        .source_map()
+                        .span_to_snippet(span)
+                        .ok()
+                        .and_then(|snippet| {
+                            let left = snippet.find('"')?;
+                            let right = snippet.rfind('"').map(|pos| snippet.len() - pos)?;
+
+                            Some(
+                                span
+                                    .with_lo(span.lo() + BytePos(left as u32 + 1))
+                                    .with_hi(span.hi() - BytePos(right as u32)),
+                            )
+                        })
+                        .unwrap_or(span);
+
+                    Ident::new(name, sp)
                 },
             )
         };
diff --git a/compiler/rustc_lint/src/transmute.rs b/compiler/rustc_lint/src/transmute.rs
index bc1d4587d07..239c8649041 100644
--- a/compiler/rustc_lint/src/transmute.rs
+++ b/compiler/rustc_lint/src/transmute.rs
@@ -1,3 +1,4 @@
+use rustc_ast::LitKind;
 use rustc_errors::Applicability;
 use rustc_hir::def::{DefKind, Res};
 use rustc_hir::def_id::LocalDefId;
@@ -7,6 +8,7 @@ use rustc_middle::ty::{self, Ty};
 use rustc_session::{declare_lint, impl_lint_pass};
 use rustc_span::sym;
 
+use crate::lints::{IntegerToPtrTransmutes, IntegerToPtrTransmutesSuggestion};
 use crate::{LateContext, LateLintPass};
 
 declare_lint! {
@@ -67,9 +69,44 @@ declare_lint! {
     "detects transmutes that can also be achieved by other operations"
 }
 
+declare_lint! {
+    /// The `integer_to_ptr_transmutes` lint detects integer to pointer
+    /// transmutes where the resulting pointers are undefined behavior to dereference.
+    ///
+    /// ### Example
+    ///
+    /// ```rust
+    /// fn foo(a: usize) -> *const u8 {
+    ///    unsafe {
+    ///        std::mem::transmute::<usize, *const u8>(a)
+    ///    }
+    /// }
+    /// ```
+    ///
+    /// {{produces}}
+    ///
+    /// ### Explanation
+    ///
+    /// Any attempt to use the resulting pointers are undefined behavior as the resulting
+    /// pointers won't have any provenance.
+    ///
+    /// Alternatively, [`std::ptr::with_exposed_provenance`] should be used, as they do not
+    /// carry the provenance requirement. If wanting to create pointers without provenance
+    /// [`std::ptr::without_provenance`] should be used instead.
+    ///
+    /// See [`std::mem::transmute`] in the reference for more details.
+    ///
+    /// [`std::mem::transmute`]: https://doc.rust-lang.org/std/mem/fn.transmute.html
+    /// [`std::ptr::with_exposed_provenance`]: https://doc.rust-lang.org/std/ptr/fn.with_exposed_provenance.html
+    /// [`std::ptr::without_provenance`]: https://doc.rust-lang.org/std/ptr/fn.without_provenance.html
+    pub INTEGER_TO_PTR_TRANSMUTES,
+    Warn,
+    "detects integer to pointer transmutes",
+}
+
 pub(crate) struct CheckTransmutes;
 
-impl_lint_pass!(CheckTransmutes => [PTR_TO_INTEGER_TRANSMUTE_IN_CONSTS, UNNECESSARY_TRANSMUTES]);
+impl_lint_pass!(CheckTransmutes => [PTR_TO_INTEGER_TRANSMUTE_IN_CONSTS, UNNECESSARY_TRANSMUTES, INTEGER_TO_PTR_TRANSMUTES]);
 
 impl<'tcx> LateLintPass<'tcx> for CheckTransmutes {
     fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx hir::Expr<'tcx>) {
@@ -94,9 +131,62 @@ impl<'tcx> LateLintPass<'tcx> for CheckTransmutes {
 
         check_ptr_transmute_in_const(cx, expr, body_owner_def_id, const_context, src, dst);
         check_unnecessary_transmute(cx, expr, callee, arg, const_context, src, dst);
+        check_int_to_ptr_transmute(cx, expr, arg, src, dst);
     }
 }
 
+/// Check for transmutes from integer to pointers (*const/*mut and &/&mut).
+///
+/// Using the resulting pointers would be undefined behavior.
+fn check_int_to_ptr_transmute<'tcx>(
+    cx: &LateContext<'tcx>,
+    expr: &'tcx hir::Expr<'tcx>,
+    arg: &'tcx hir::Expr<'tcx>,
+    src: Ty<'tcx>,
+    dst: Ty<'tcx>,
+) {
+    if !matches!(src.kind(), ty::Uint(_) | ty::Int(_)) {
+        return;
+    }
+    let (ty::Ref(_, inner_ty, mutbl) | ty::RawPtr(inner_ty, mutbl)) = dst.kind() else {
+        return;
+    };
+    // bail-out if the argument is literal 0 as we have other lints for those cases
+    if matches!(arg.kind, hir::ExprKind::Lit(hir::Lit { node: LitKind::Int(v, _), .. }) if v == 0) {
+        return;
+    }
+    // bail-out if the inner type is a ZST
+    let Ok(layout_inner_ty) = cx.tcx.layout_of(cx.typing_env().as_query_input(*inner_ty)) else {
+        return;
+    };
+    if layout_inner_ty.is_1zst() {
+        return;
+    }
+
+    let suffix = if mutbl.is_mut() { "_mut" } else { "" };
+    cx.tcx.emit_node_span_lint(
+        INTEGER_TO_PTR_TRANSMUTES,
+        expr.hir_id,
+        expr.span,
+        IntegerToPtrTransmutes {
+            suggestion: if dst.is_ref() {
+                IntegerToPtrTransmutesSuggestion::ToRef {
+                    dst: *inner_ty,
+                    suffix,
+                    ref_mutbl: mutbl.prefix_str(),
+                    start_call: expr.span.shrink_to_lo().until(arg.span),
+                }
+            } else {
+                IntegerToPtrTransmutesSuggestion::ToPtr {
+                    dst: *inner_ty,
+                    suffix,
+                    start_call: expr.span.shrink_to_lo().until(arg.span),
+                }
+            },
+        },
+    );
+}
+
 /// Check for transmutes that exhibit undefined behavior.
 /// For example, transmuting pointers to integers in a const context.
 ///
diff --git a/compiler/rustc_middle/src/mir/syntax.rs b/compiler/rustc_middle/src/mir/syntax.rs
index 6039a03aa29..3b8def67f92 100644
--- a/compiler/rustc_middle/src/mir/syntax.rs
+++ b/compiler/rustc_middle/src/mir/syntax.rs
@@ -1371,12 +1371,7 @@ pub enum Rvalue<'tcx> {
 
     /// Creates an array where each element is the value of the operand.
     ///
-    /// This is the cause of a bug in the case where the repetition count is zero because the value
-    /// is not dropped, see [#74836].
-    ///
     /// Corresponds to source code like `[x; 32]`.
-    ///
-    /// [#74836]: https://github.com/rust-lang/rust/issues/74836
     Repeat(Operand<'tcx>, ty::Const<'tcx>),
 
     /// Creates a reference of the indicated kind to the place.
diff --git a/compiler/rustc_middle/src/ty/context.rs b/compiler/rustc_middle/src/ty/context.rs
index 01a108c0698..5dbbc7297ab 100644
--- a/compiler/rustc_middle/src/ty/context.rs
+++ b/compiler/rustc_middle/src/ty/context.rs
@@ -1447,6 +1447,8 @@ pub struct TyCtxt<'tcx> {
 }
 
 impl<'tcx> LintEmitter for TyCtxt<'tcx> {
+    type Id = HirId;
+
     fn emit_node_span_lint(
         self,
         lint: &'static Lint,
diff --git a/compiler/rustc_passes/src/check_attr.rs b/compiler/rustc_passes/src/check_attr.rs
index c610ce4fc85..7aef60b7b91 100644
--- a/compiler/rustc_passes/src/check_attr.rs
+++ b/compiler/rustc_passes/src/check_attr.rs
@@ -250,7 +250,8 @@ impl<'tcx> CheckAttrVisitor<'tcx> {
                     | AttributeKind::ShouldPanic { .. }
                     | AttributeKind::Coroutine(..)
                     | AttributeKind::Linkage(..)
-                    | AttributeKind::MustUse { .. },
+                    | AttributeKind::MustUse { .. }
+                    | AttributeKind::CrateName { .. }
                 ) => { /* do nothing  */ }
                 Attribute::Unparsed(attr_item) => {
                     style = Some(attr_item.style);
@@ -367,22 +368,49 @@ impl<'tcx> CheckAttrVisitor<'tcx> {
             let builtin = attr.ident().and_then(|ident| BUILTIN_ATTRIBUTE_MAP.get(&ident.name));
 
             if hir_id != CRATE_HIR_ID {
-                if let Some(BuiltinAttribute { type_: AttributeType::CrateLevel, .. }) =
-                    attr.ident().and_then(|ident| BUILTIN_ATTRIBUTE_MAP.get(&ident.name))
-                {
-                    match style {
-                        Some(ast::AttrStyle::Outer) => self.tcx.emit_node_span_lint(
+                match attr {
+                    // FIXME(jdonszelmann) move to attribute parsing when validation gets better there
+                    &Attribute::Parsed(AttributeKind::CrateName {
+                        attr_span: span, style, ..
+                    }) => match style {
+                        ast::AttrStyle::Outer => self.tcx.emit_node_span_lint(
                             UNUSED_ATTRIBUTES,
                             hir_id,
-                            attr.span(),
+                            span,
                             errors::OuterCrateLevelAttr,
                         ),
-                        Some(ast::AttrStyle::Inner) | None => self.tcx.emit_node_span_lint(
+                        ast::AttrStyle::Inner => self.tcx.emit_node_span_lint(
                             UNUSED_ATTRIBUTES,
                             hir_id,
-                            attr.span(),
+                            span,
                             errors::InnerCrateLevelAttr,
                         ),
+                    },
+                    Attribute::Parsed(_) => { /* not crate-level */ }
+                    Attribute::Unparsed(attr) => {
+                        // FIXME(jdonszelmann): remove once all crate-level attrs are parsed and caught by
+                        // the above
+                        if let Some(BuiltinAttribute { type_: AttributeType::CrateLevel, .. }) =
+                            attr.path
+                                .segments
+                                .first()
+                                .and_then(|ident| BUILTIN_ATTRIBUTE_MAP.get(&ident.name))
+                        {
+                            match attr.style {
+                                ast::AttrStyle::Outer => self.tcx.emit_node_span_lint(
+                                    UNUSED_ATTRIBUTES,
+                                    hir_id,
+                                    attr.span,
+                                    errors::OuterCrateLevelAttr,
+                                ),
+                                ast::AttrStyle::Inner => self.tcx.emit_node_span_lint(
+                                    UNUSED_ATTRIBUTES,
+                                    hir_id,
+                                    attr.span,
+                                    errors::InnerCrateLevelAttr,
+                                ),
+                            }
+                        }
                     }
                 }
             }
diff --git a/compiler/rustc_session/src/session.rs b/compiler/rustc_session/src/session.rs
index bb7ffa2a85d..96767d05439 100644
--- a/compiler/rustc_session/src/session.rs
+++ b/compiler/rustc_session/src/session.rs
@@ -7,6 +7,7 @@ use std::sync::atomic::AtomicBool;
 use std::{env, fmt, io};
 
 use rand::{RngCore, rng};
+use rustc_ast::NodeId;
 use rustc_data_structures::base_n::{CASE_INSENSITIVE, ToBaseN};
 use rustc_data_structures::flock;
 use rustc_data_structures::fx::{FxHashMap, FxIndexSet};
@@ -22,7 +23,7 @@ use rustc_errors::timings::TimingSectionHandler;
 use rustc_errors::translation::Translator;
 use rustc_errors::{
     Diag, DiagCtxt, DiagCtxtHandle, DiagMessage, Diagnostic, ErrorGuaranteed, FatalAbort,
-    TerminalUrl, fallback_fluent_bundle,
+    LintEmitter, TerminalUrl, fallback_fluent_bundle,
 };
 use rustc_macros::HashStable_Generic;
 pub use rustc_span::def_id::StableCrateId;
@@ -223,6 +224,20 @@ pub struct Session {
     pub invocation_temp: Option<String>,
 }
 
+impl LintEmitter for &'_ Session {
+    type Id = NodeId;
+
+    fn emit_node_span_lint(
+        self,
+        lint: &'static rustc_lint_defs::Lint,
+        node_id: Self::Id,
+        span: impl Into<rustc_errors::MultiSpan>,
+        decorator: impl for<'a> rustc_errors::LintDiagnostic<'a, ()> + DynSend + 'static,
+    ) {
+        self.psess.buffer_lint(lint, span, node_id, decorator);
+    }
+}
+
 #[derive(Clone, Copy)]
 pub enum CodegenUnits {
     /// Specified by the user. In this case we try fairly hard to produce the