diff --git a/compiler/rustc_codegen_gcc/src/coverageinfo.rs b/compiler/rustc_codegen_gcc/src/coverageinfo.rs
index 849e9886ef39d..4e44f78f23c26 100644
--- a/compiler/rustc_codegen_gcc/src/coverageinfo.rs
+++ b/compiler/rustc_codegen_gcc/src/coverageinfo.rs
@@ -1,11 +1,11 @@
 use rustc_codegen_ssa::traits::CoverageInfoBuilderMethods;
-use rustc_middle::mir::Coverage;
+use rustc_middle::mir::coverage::CoverageKind;
 use rustc_middle::ty::Instance;
 
 use crate::builder::Builder;
 
 impl<'a, 'gcc, 'tcx> CoverageInfoBuilderMethods<'tcx> for Builder<'a, 'gcc, 'tcx> {
-    fn add_coverage(&mut self, _instance: Instance<'tcx>, _coverage: &Coverage) {
+    fn add_coverage(&mut self, _instance: Instance<'tcx>, _kind: &CoverageKind) {
         // TODO(antoyo)
     }
 }
diff --git a/compiler/rustc_codegen_llvm/src/coverageinfo/mod.rs b/compiler/rustc_codegen_llvm/src/coverageinfo/mod.rs
index 54f4bc0634021..85277db6d538a 100644
--- a/compiler/rustc_codegen_llvm/src/coverageinfo/mod.rs
+++ b/compiler/rustc_codegen_llvm/src/coverageinfo/mod.rs
@@ -14,7 +14,6 @@ use rustc_data_structures::fx::{FxHashMap, FxIndexMap};
 use rustc_llvm::RustString;
 use rustc_middle::bug;
 use rustc_middle::mir::coverage::CoverageKind;
-use rustc_middle::mir::Coverage;
 use rustc_middle::ty::layout::HasTyCtxt;
 use rustc_middle::ty::Instance;
 
@@ -75,7 +74,7 @@ impl<'ll, 'tcx> CodegenCx<'ll, 'tcx> {
 
 impl<'tcx> CoverageInfoBuilderMethods<'tcx> for Builder<'_, '_, 'tcx> {
     #[instrument(level = "debug", skip(self))]
-    fn add_coverage(&mut self, instance: Instance<'tcx>, coverage: &Coverage) {
+    fn add_coverage(&mut self, instance: Instance<'tcx>, kind: &CoverageKind) {
         // Our caller should have already taken care of inlining subtleties,
         // so we can assume that counter/expression IDs in this coverage
         // statement are meaningful for the given instance.
@@ -98,7 +97,6 @@ impl<'tcx> CoverageInfoBuilderMethods<'tcx> for Builder<'_, '_, 'tcx> {
             .entry(instance)
             .or_insert_with(|| FunctionCoverageCollector::new(instance, function_coverage_info));
 
-        let Coverage { kind } = coverage;
         match *kind {
             CoverageKind::SpanMarker | CoverageKind::BlockMarker { .. } => unreachable!(
                 "marker statement {kind:?} should have been removed by CleanupPostBorrowck"
diff --git a/compiler/rustc_codegen_ssa/src/mir/coverageinfo.rs b/compiler/rustc_codegen_ssa/src/mir/coverageinfo.rs
index ee70465966d0c..721872772287b 100644
--- a/compiler/rustc_codegen_ssa/src/mir/coverageinfo.rs
+++ b/compiler/rustc_codegen_ssa/src/mir/coverageinfo.rs
@@ -1,12 +1,12 @@
 use crate::traits::*;
 
-use rustc_middle::mir::Coverage;
+use rustc_middle::mir::coverage::CoverageKind;
 use rustc_middle::mir::SourceScope;
 
 use super::FunctionCx;
 
 impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
-    pub fn codegen_coverage(&self, bx: &mut Bx, coverage: &Coverage, scope: SourceScope) {
+    pub fn codegen_coverage(&self, bx: &mut Bx, kind: &CoverageKind, scope: SourceScope) {
         // Determine the instance that coverage data was originally generated for.
         let instance = if let Some(inlined) = scope.inlined_instance(&self.mir.source_scopes) {
             self.monomorphize(inlined)
@@ -15,6 +15,6 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
         };
 
         // Handle the coverage info in a backend-specific way.
-        bx.add_coverage(instance, coverage);
+        bx.add_coverage(instance, kind);
     }
 }
diff --git a/compiler/rustc_codegen_ssa/src/mir/statement.rs b/compiler/rustc_codegen_ssa/src/mir/statement.rs
index ac7dfbb261dec..2188eeae42686 100644
--- a/compiler/rustc_codegen_ssa/src/mir/statement.rs
+++ b/compiler/rustc_codegen_ssa/src/mir/statement.rs
@@ -64,8 +64,8 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
                     cg_indirect_place.storage_dead(bx);
                 }
             }
-            mir::StatementKind::Coverage(box ref coverage) => {
-                self.codegen_coverage(bx, coverage, statement.source_info.scope);
+            mir::StatementKind::Coverage(ref kind) => {
+                self.codegen_coverage(bx, kind, statement.source_info.scope);
             }
             mir::StatementKind::Intrinsic(box NonDivergingIntrinsic::Assume(ref op)) => {
                 if !matches!(bx.tcx().sess.opts.optimize, OptLevel::No | OptLevel::Less) {
diff --git a/compiler/rustc_codegen_ssa/src/traits/coverageinfo.rs b/compiler/rustc_codegen_ssa/src/traits/coverageinfo.rs
index 7e8de0ddc5bf4..d1d813bd38922 100644
--- a/compiler/rustc_codegen_ssa/src/traits/coverageinfo.rs
+++ b/compiler/rustc_codegen_ssa/src/traits/coverageinfo.rs
@@ -1,5 +1,5 @@
 use super::BackendTypes;
-use rustc_middle::mir::Coverage;
+use rustc_middle::mir::coverage::CoverageKind;
 use rustc_middle::ty::Instance;
 
 pub trait CoverageInfoBuilderMethods<'tcx>: BackendTypes {
@@ -7,5 +7,5 @@ pub trait CoverageInfoBuilderMethods<'tcx>: BackendTypes {
     ///
     /// This can potentially be a no-op in backends that don't support
     /// coverage instrumentation.
-    fn add_coverage(&mut self, instance: Instance<'tcx>, coverage: &Coverage);
+    fn add_coverage(&mut self, instance: Instance<'tcx>, kind: &CoverageKind);
 }
diff --git a/compiler/rustc_const_eval/src/transform/validate.rs b/compiler/rustc_const_eval/src/transform/validate.rs
index 1664475f52a13..08e3e42a82e27 100644
--- a/compiler/rustc_const_eval/src/transform/validate.rs
+++ b/compiler/rustc_const_eval/src/transform/validate.rs
@@ -346,8 +346,7 @@ impl<'a, 'tcx> Visitor<'tcx> for CfgChecker<'a, 'tcx> {
                     self.fail(location, format!("explicit `{kind:?}` is forbidden"));
                 }
             }
-            StatementKind::Coverage(coverage) => {
-                let kind = &coverage.kind;
+            StatementKind::Coverage(kind) => {
                 if self.mir_phase >= MirPhase::Analysis(AnalysisPhase::PostCleanup)
                     && let CoverageKind::BlockMarker { .. } | CoverageKind::SpanMarker { .. } = kind
                 {
diff --git a/compiler/rustc_errors/src/emitter.rs b/compiler/rustc_errors/src/emitter.rs
index fceccb7e9b6e5..bd8e78bda2639 100644
--- a/compiler/rustc_errors/src/emitter.rs
+++ b/compiler/rustc_errors/src/emitter.rs
@@ -541,6 +541,7 @@ pub struct SilentEmitter {
     pub fallback_bundle: LazyFallbackBundle,
     pub fatal_dcx: DiagCtxt,
     pub fatal_note: Option<String>,
+    pub emit_fatal_diagnostic: bool,
 }
 
 impl Translate for SilentEmitter {
@@ -561,7 +562,7 @@ impl Emitter for SilentEmitter {
     }
 
     fn emit_diagnostic(&mut self, mut diag: DiagInner) {
-        if diag.level == Level::Fatal {
+        if self.emit_fatal_diagnostic && diag.level == Level::Fatal {
             if let Some(fatal_note) = &self.fatal_note {
                 diag.sub(Level::Note, fatal_note.clone(), MultiSpan::new());
             }
diff --git a/compiler/rustc_errors/src/lib.rs b/compiler/rustc_errors/src/lib.rs
index 238bc63ec5885..7b40954e735db 100644
--- a/compiler/rustc_errors/src/lib.rs
+++ b/compiler/rustc_errors/src/lib.rs
@@ -612,12 +612,18 @@ impl DiagCtxt {
         Self { inner: Lock::new(DiagCtxtInner::new(emitter)) }
     }
 
-    pub fn make_silent(&mut self, fallback_bundle: LazyFallbackBundle, fatal_note: Option<String>) {
+    pub fn make_silent(
+        &mut self,
+        fallback_bundle: LazyFallbackBundle,
+        fatal_note: Option<String>,
+        emit_fatal_diagnostic: bool,
+    ) {
         self.wrap_emitter(|old_dcx| {
             Box::new(emitter::SilentEmitter {
                 fallback_bundle,
                 fatal_dcx: DiagCtxt { inner: Lock::new(old_dcx) },
                 fatal_note,
+                emit_fatal_diagnostic,
             })
         });
     }
diff --git a/compiler/rustc_interface/src/interface.rs b/compiler/rustc_interface/src/interface.rs
index 8ba14d3798205..656c7ffae1933 100644
--- a/compiler/rustc_interface/src/interface.rs
+++ b/compiler/rustc_interface/src/interface.rs
@@ -48,6 +48,7 @@ pub(crate) fn parse_cfg(dcx: &DiagCtxt, cfgs: Vec<String>) -> Cfg {
             let psess = ParseSess::with_silent_emitter(
                 vec![crate::DEFAULT_LOCALE_RESOURCE, rustc_parse::DEFAULT_LOCALE_RESOURCE],
                 format!("this error occurred on the command line: `--cfg={s}`"),
+                true,
             );
             let filename = FileName::cfg_spec_source_code(&s);
 
@@ -111,6 +112,7 @@ pub(crate) fn parse_check_cfg(dcx: &DiagCtxt, specs: Vec<String>) -> CheckCfg {
         let psess = ParseSess::with_silent_emitter(
             vec![crate::DEFAULT_LOCALE_RESOURCE, rustc_parse::DEFAULT_LOCALE_RESOURCE],
             format!("this error occurred on the command line: `--check-cfg={s}`"),
+            true,
         );
         let filename = FileName::cfg_spec_source_code(&s);
 
diff --git a/compiler/rustc_metadata/src/creader.rs b/compiler/rustc_metadata/src/creader.rs
index b544bc8a782c4..784fd4b3a3b72 100644
--- a/compiler/rustc_metadata/src/creader.rs
+++ b/compiler/rustc_metadata/src/creader.rs
@@ -389,6 +389,15 @@ impl<'a, 'tcx> CrateLoader<'a, 'tcx> {
         None
     }
 
+    // The `dependency` type is determined by the command line arguments(`--extern`) and
+    // `private_dep`. However, sometimes the directly dependent crate is not specified by
+    // `--extern`, in this case, `private-dep` is none during loading. This is equivalent to the
+    // scenario where the command parameter is set to `public-dependency`
+    fn is_private_dep(&self, name: &str, private_dep: Option<bool>) -> bool {
+        self.sess.opts.externs.get(name).map_or(private_dep.unwrap_or(false), |e| e.is_private_dep)
+            && private_dep.unwrap_or(true)
+    }
+
     fn register_crate(
         &mut self,
         host_lib: Option<Library>,
@@ -404,14 +413,7 @@ impl<'a, 'tcx> CrateLoader<'a, 'tcx> {
         let Library { source, metadata } = lib;
         let crate_root = metadata.get_root();
         let host_hash = host_lib.as_ref().map(|lib| lib.metadata.get_root().hash());
-
-        let private_dep = self
-            .sess
-            .opts
-            .externs
-            .get(name.as_str())
-            .map_or(private_dep.unwrap_or(false), |e| e.is_private_dep)
-            && private_dep.unwrap_or(true);
+        let private_dep = self.is_private_dep(name.as_str(), private_dep);
 
         // Claim this crate number and cache it
         let cnum = self.cstore.intern_stable_crate_id(&crate_root)?;
@@ -601,14 +603,17 @@ impl<'a, 'tcx> CrateLoader<'a, 'tcx> {
 
         match result {
             (LoadResult::Previous(cnum), None) => {
+                // When `private_dep` is none, it indicates the directly dependent crate. If it is
+                // not specified by `--extern` on command line parameters, it may be
+                // `private-dependency` when `register_crate` is called for the first time. Then it must be updated to
+                // `public-dependency` here.
+                let private_dep = self.is_private_dep(name.as_str(), private_dep);
                 let data = self.cstore.get_crate_data_mut(cnum);
                 if data.is_proc_macro_crate() {
                     dep_kind = CrateDepKind::MacrosOnly;
                 }
                 data.set_dep_kind(cmp::max(data.dep_kind(), dep_kind));
-                if let Some(private_dep) = private_dep {
-                    data.update_and_private_dep(private_dep);
-                }
+                data.update_and_private_dep(private_dep);
                 Ok(cnum)
             }
             (LoadResult::Loaded(library), host_library) => {
diff --git a/compiler/rustc_middle/src/mir/pretty.rs b/compiler/rustc_middle/src/mir/pretty.rs
index fbee4a9366fb3..f0499cf344fca 100644
--- a/compiler/rustc_middle/src/mir/pretty.rs
+++ b/compiler/rustc_middle/src/mir/pretty.rs
@@ -13,7 +13,7 @@ use rustc_middle::mir::interpret::{
     Provenance,
 };
 use rustc_middle::mir::visit::Visitor;
-use rustc_middle::mir::{self, *};
+use rustc_middle::mir::*;
 use rustc_target::abi::Size;
 
 const INDENT: &str = "    ";
@@ -711,7 +711,7 @@ impl Debug for Statement<'_> {
             AscribeUserType(box (ref place, ref c_ty), ref variance) => {
                 write!(fmt, "AscribeUserType({place:?}, {variance:?}, {c_ty:?})")
             }
-            Coverage(box mir::Coverage { ref kind }) => write!(fmt, "Coverage::{kind:?}"),
+            Coverage(ref kind) => write!(fmt, "Coverage::{kind:?}"),
             Intrinsic(box ref intrinsic) => write!(fmt, "{intrinsic}"),
             ConstEvalCounter => write!(fmt, "ConstEvalCounter"),
             Nop => write!(fmt, "nop"),
diff --git a/compiler/rustc_middle/src/mir/syntax.rs b/compiler/rustc_middle/src/mir/syntax.rs
index 36b7a48b2a2b8..12bf8efd73ada 100644
--- a/compiler/rustc_middle/src/mir/syntax.rs
+++ b/compiler/rustc_middle/src/mir/syntax.rs
@@ -373,7 +373,7 @@ pub enum StatementKind<'tcx> {
     ///
     /// Interpreters and codegen backends that don't support coverage instrumentation
     /// can usually treat this as a no-op.
-    Coverage(Box<Coverage>),
+    Coverage(CoverageKind),
 
     /// Denotes a call to an intrinsic that does not require an unwind path and always returns.
     /// This avoids adding a new block and a terminator for simple intrinsics.
@@ -517,12 +517,6 @@ pub enum FakeReadCause {
     ForIndex,
 }
 
-#[derive(Clone, Debug, PartialEq, TyEncodable, TyDecodable, Hash, HashStable)]
-#[derive(TypeFoldable, TypeVisitable)]
-pub struct Coverage {
-    pub kind: CoverageKind,
-}
-
 #[derive(Clone, Debug, PartialEq, TyEncodable, TyDecodable, Hash, HashStable)]
 #[derive(TypeFoldable, TypeVisitable)]
 pub struct CopyNonOverlapping<'tcx> {
@@ -1458,5 +1452,6 @@ mod size_asserts {
     static_assert_size!(Place<'_>, 16);
     static_assert_size!(PlaceElem<'_>, 24);
     static_assert_size!(Rvalue<'_>, 40);
+    static_assert_size!(StatementKind<'_>, 16);
     // tidy-alphabetical-end
 }
diff --git a/compiler/rustc_middle/src/mir/visit.rs b/compiler/rustc_middle/src/mir/visit.rs
index be960669ff4d0..3835bd371d996 100644
--- a/compiler/rustc_middle/src/mir/visit.rs
+++ b/compiler/rustc_middle/src/mir/visit.rs
@@ -156,10 +156,10 @@ macro_rules! make_mir_visitor {
 
             fn visit_coverage(
                 &mut self,
-                coverage: & $($mutability)? Coverage,
+                kind: & $($mutability)? coverage::CoverageKind,
                 location: Location,
             ) {
-                self.super_coverage(coverage, location);
+                self.super_coverage(kind, location);
             }
 
             fn visit_retag(
@@ -803,7 +803,7 @@ macro_rules! make_mir_visitor {
             }
 
             fn super_coverage(&mut self,
-                              _coverage: & $($mutability)? Coverage,
+                              _kind: & $($mutability)? coverage::CoverageKind,
                               _location: Location) {
             }
 
diff --git a/compiler/rustc_mir_build/src/build/cfg.rs b/compiler/rustc_mir_build/src/build/cfg.rs
index 2bd0e28973101..18e45291e9a86 100644
--- a/compiler/rustc_mir_build/src/build/cfg.rs
+++ b/compiler/rustc_mir_build/src/build/cfg.rs
@@ -107,9 +107,7 @@ impl<'tcx> CFG<'tcx> {
     /// This results in more accurate coverage reports for certain kinds of
     /// syntax (e.g. `continue` or `if !`) that would otherwise not appear in MIR.
     pub(crate) fn push_coverage_span_marker(&mut self, block: BasicBlock, source_info: SourceInfo) {
-        let kind = StatementKind::Coverage(Box::new(Coverage {
-            kind: coverage::CoverageKind::SpanMarker,
-        }));
+        let kind = StatementKind::Coverage(coverage::CoverageKind::SpanMarker);
         let stmt = Statement { source_info, kind };
         self.push(block, stmt);
     }
diff --git a/compiler/rustc_mir_build/src/build/coverageinfo.rs b/compiler/rustc_mir_build/src/build/coverageinfo.rs
index 0b8ec234dda7a..ab0043906b19f 100644
--- a/compiler/rustc_mir_build/src/build/coverageinfo.rs
+++ b/compiler/rustc_mir_build/src/build/coverageinfo.rs
@@ -127,9 +127,7 @@ impl Builder<'_, '_> {
 
             let marker_statement = mir::Statement {
                 source_info,
-                kind: mir::StatementKind::Coverage(Box::new(mir::Coverage {
-                    kind: CoverageKind::BlockMarker { id },
-                })),
+                kind: mir::StatementKind::Coverage(CoverageKind::BlockMarker { id }),
             };
             self.cfg.push(block, marker_statement);
 
diff --git a/compiler/rustc_mir_transform/src/cleanup_post_borrowck.rs b/compiler/rustc_mir_transform/src/cleanup_post_borrowck.rs
index aaf2035fc2103..da82f8de78147 100644
--- a/compiler/rustc_mir_transform/src/cleanup_post_borrowck.rs
+++ b/compiler/rustc_mir_transform/src/cleanup_post_borrowck.rs
@@ -18,7 +18,7 @@
 
 use crate::MirPass;
 use rustc_middle::mir::coverage::CoverageKind;
-use rustc_middle::mir::{Body, BorrowKind, Coverage, Rvalue, StatementKind, TerminatorKind};
+use rustc_middle::mir::{Body, BorrowKind, Rvalue, StatementKind, TerminatorKind};
 use rustc_middle::ty::TyCtxt;
 
 pub struct CleanupPostBorrowck;
@@ -30,12 +30,11 @@ impl<'tcx> MirPass<'tcx> for CleanupPostBorrowck {
                 match statement.kind {
                     StatementKind::AscribeUserType(..)
                     | StatementKind::Assign(box (_, Rvalue::Ref(_, BorrowKind::Fake, _)))
-                    | StatementKind::Coverage(box Coverage {
+                    | StatementKind::Coverage(
                         // These kinds of coverage statements are markers inserted during
                         // MIR building, and are not needed after InstrumentCoverage.
-                        kind: CoverageKind::BlockMarker { .. } | CoverageKind::SpanMarker { .. },
-                        ..
-                    })
+                        CoverageKind::BlockMarker { .. } | CoverageKind::SpanMarker { .. },
+                    )
                     | StatementKind::FakeRead(..) => statement.make_nop(),
                     _ => (),
                 }
diff --git a/compiler/rustc_mir_transform/src/coverage/mod.rs b/compiler/rustc_mir_transform/src/coverage/mod.rs
index 83189c6a50a77..ae3b1a3d1af3b 100644
--- a/compiler/rustc_mir_transform/src/coverage/mod.rs
+++ b/compiler/rustc_mir_transform/src/coverage/mod.rs
@@ -15,7 +15,7 @@ use crate::MirPass;
 
 use rustc_middle::mir::coverage::*;
 use rustc_middle::mir::{
-    self, BasicBlock, BasicBlockData, Coverage, SourceInfo, Statement, StatementKind, Terminator,
+    self, BasicBlock, BasicBlockData, SourceInfo, Statement, StatementKind, Terminator,
     TerminatorKind,
 };
 use rustc_middle::ty::TyCtxt;
@@ -230,10 +230,7 @@ fn inject_statement(mir_body: &mut mir::Body<'_>, counter_kind: CoverageKind, bb
     debug!("  injecting statement {counter_kind:?} for {bb:?}");
     let data = &mut mir_body[bb];
     let source_info = data.terminator().source_info;
-    let statement = Statement {
-        source_info,
-        kind: StatementKind::Coverage(Box::new(Coverage { kind: counter_kind })),
-    };
+    let statement = Statement { source_info, kind: StatementKind::Coverage(counter_kind) };
     data.statements.insert(0, statement);
 }
 
diff --git a/compiler/rustc_mir_transform/src/coverage/query.rs b/compiler/rustc_mir_transform/src/coverage/query.rs
index 1de7b6f66a7bc..b5dd9dcc7b467 100644
--- a/compiler/rustc_mir_transform/src/coverage/query.rs
+++ b/compiler/rustc_mir_transform/src/coverage/query.rs
@@ -1,7 +1,7 @@
 use rustc_data_structures::captures::Captures;
 use rustc_middle::middle::codegen_fn_attrs::CodegenFnAttrFlags;
 use rustc_middle::mir::coverage::{CounterId, CoverageKind};
-use rustc_middle::mir::{Body, Coverage, CoverageIdsInfo, Statement, StatementKind};
+use rustc_middle::mir::{Body, CoverageIdsInfo, Statement, StatementKind};
 use rustc_middle::query::TyCtxtAt;
 use rustc_middle::ty::{self, TyCtxt};
 use rustc_middle::util::Providers;
@@ -54,7 +54,7 @@ fn coverage_ids_info<'tcx>(
     let mir_body = tcx.instance_mir(instance_def);
 
     let max_counter_id = all_coverage_in_mir_body(mir_body)
-        .filter_map(|coverage| match coverage.kind {
+        .filter_map(|kind| match *kind {
             CoverageKind::CounterIncrement { id } => Some(id),
             _ => None,
         })
@@ -66,12 +66,10 @@ fn coverage_ids_info<'tcx>(
 
 fn all_coverage_in_mir_body<'a, 'tcx>(
     body: &'a Body<'tcx>,
-) -> impl Iterator<Item = &'a Coverage> + Captures<'tcx> {
+) -> impl Iterator<Item = &'a CoverageKind> + Captures<'tcx> {
     body.basic_blocks.iter().flat_map(|bb_data| &bb_data.statements).filter_map(|statement| {
         match statement.kind {
-            StatementKind::Coverage(box ref coverage) if !is_inlined(body, statement) => {
-                Some(coverage)
-            }
+            StatementKind::Coverage(ref kind) if !is_inlined(body, statement) => Some(kind),
             _ => None,
         }
     })
diff --git a/compiler/rustc_mir_transform/src/coverage/spans/from_mir.rs b/compiler/rustc_mir_transform/src/coverage/spans/from_mir.rs
index 3f6a4156044e8..adb0c9f1929d9 100644
--- a/compiler/rustc_mir_transform/src/coverage/spans/from_mir.rs
+++ b/compiler/rustc_mir_transform/src/coverage/spans/from_mir.rs
@@ -187,9 +187,7 @@ fn filtered_statement_span(statement: &Statement<'_>) -> Option<Span> {
         // for their parent `BasicBlock`.
         StatementKind::StorageLive(_)
         | StatementKind::StorageDead(_)
-        // Ignore `ConstEvalCounter`s
         | StatementKind::ConstEvalCounter
-        // Ignore `Nop`s
         | StatementKind::Nop => None,
 
         // FIXME(#78546): MIR InstrumentCoverage - Can the source_info.span for `FakeRead`
@@ -211,30 +209,28 @@ fn filtered_statement_span(statement: &Statement<'_>) -> Option<Span> {
         StatementKind::FakeRead(box (FakeReadCause::ForGuardBinding, _)) => None,
 
         // Retain spans from most other statements.
-        StatementKind::FakeRead(box (_, _)) // Not including `ForGuardBinding`
+        StatementKind::FakeRead(_)
         | StatementKind::Intrinsic(..)
-        | StatementKind::Coverage(box mir::Coverage {
+        | StatementKind::Coverage(
             // The purpose of `SpanMarker` is to be matched and accepted here.
-            kind: CoverageKind::SpanMarker
-        })
+            CoverageKind::SpanMarker,
+        )
         | StatementKind::Assign(_)
         | StatementKind::SetDiscriminant { .. }
         | StatementKind::Deinit(..)
         | StatementKind::Retag(_, _)
         | StatementKind::PlaceMention(..)
-        | StatementKind::AscribeUserType(_, _) => {
-            Some(statement.source_info.span)
-        }
+        | StatementKind::AscribeUserType(_, _) => Some(statement.source_info.span),
 
-        StatementKind::Coverage(box mir::Coverage {
-            // Block markers are used for branch coverage, so ignore them here.
-            kind: CoverageKind::BlockMarker {..}
-        }) => None,
+        // Block markers are used for branch coverage, so ignore them here.
+        StatementKind::Coverage(CoverageKind::BlockMarker { .. }) => None,
 
-        StatementKind::Coverage(box mir::Coverage {
-            // These coverage statements should not exist prior to coverage instrumentation.
-            kind: CoverageKind::CounterIncrement { .. } | CoverageKind::ExpressionUsed { .. }
-        }) => bug!("Unexpected coverage statement found during coverage instrumentation: {statement:?}"),
+        // These coverage statements should not exist prior to coverage instrumentation.
+        StatementKind::Coverage(
+            CoverageKind::CounterIncrement { .. } | CoverageKind::ExpressionUsed { .. },
+        ) => bug!(
+            "Unexpected coverage statement found during coverage instrumentation: {statement:?}"
+        ),
     }
 }
 
@@ -382,9 +378,7 @@ pub(super) fn extract_branch_mappings(
     // Fill out the mapping from block marker IDs to their enclosing blocks.
     for (bb, data) in mir_body.basic_blocks.iter_enumerated() {
         for statement in &data.statements {
-            if let StatementKind::Coverage(coverage) = &statement.kind
-                && let CoverageKind::BlockMarker { id } = coverage.kind
-            {
+            if let StatementKind::Coverage(CoverageKind::BlockMarker { id }) = statement.kind {
                 block_markers[id] = Some(bb);
             }
         }
diff --git a/compiler/rustc_session/src/parse.rs b/compiler/rustc_session/src/parse.rs
index 5434bbe0b98a2..f6053f43fbd19 100644
--- a/compiler/rustc_session/src/parse.rs
+++ b/compiler/rustc_session/src/parse.rs
@@ -269,7 +269,11 @@ impl ParseSess {
         }
     }
 
-    pub fn with_silent_emitter(locale_resources: Vec<&'static str>, fatal_note: String) -> Self {
+    pub fn with_silent_emitter(
+        locale_resources: Vec<&'static str>,
+        fatal_note: String,
+        emit_fatal_diagnostic: bool,
+    ) -> Self {
         let fallback_bundle = fallback_fluent_bundle(locale_resources, false);
         let sm = Lrc::new(SourceMap::new(FilePathMapping::empty()));
         let emitter = Box::new(HumanEmitter::new(
@@ -281,6 +285,7 @@ impl ParseSess {
             fallback_bundle,
             fatal_dcx,
             fatal_note: Some(fatal_note),
+            emit_fatal_diagnostic,
         }))
         .disable_warnings();
         ParseSess::with_dcx(dcx, sm)
diff --git a/library/core/src/fmt/mod.rs b/library/core/src/fmt/mod.rs
index 4016167d05cd0..e880d5758ec0a 100644
--- a/library/core/src/fmt/mod.rs
+++ b/library/core/src/fmt/mod.rs
@@ -201,7 +201,7 @@ pub trait Write {
         impl<W: Write + ?Sized> SpecWriteFmt for &mut W {
             #[inline]
             default fn spec_write_fmt(mut self, args: Arguments<'_>) -> Result {
-                if let Some(s) = args.as_const_str() {
+                if let Some(s) = args.as_statically_known_str() {
                     self.write_str(s)
                 } else {
                     write(&mut self, args)
@@ -212,7 +212,7 @@ pub trait Write {
         impl<W: Write> SpecWriteFmt for &mut W {
             #[inline]
             fn spec_write_fmt(self, args: Arguments<'_>) -> Result {
-                if let Some(s) = args.as_const_str() {
+                if let Some(s) = args.as_statically_known_str() {
                     self.write_str(s)
                 } else {
                     write(self, args)
@@ -442,7 +442,7 @@ impl<'a> Arguments<'a> {
     /// Same as [`Arguments::as_str`], but will only return `Some(s)` if it can be determined at compile time.
     #[must_use]
     #[inline]
-    fn as_const_str(&self) -> Option<&'static str> {
+    fn as_statically_known_str(&self) -> Option<&'static str> {
         let s = self.as_str();
         if core::intrinsics::is_val_statically_known(s.is_some()) { s } else { None }
     }
@@ -1617,7 +1617,11 @@ impl<'a> Formatter<'a> {
     #[stable(feature = "rust1", since = "1.0.0")]
     #[inline]
     pub fn write_fmt(&mut self, fmt: Arguments<'_>) -> Result {
-        if let Some(s) = fmt.as_const_str() { self.buf.write_str(s) } else { write(self.buf, fmt) }
+        if let Some(s) = fmt.as_statically_known_str() {
+            self.buf.write_str(s)
+        } else {
+            write(self.buf, fmt)
+        }
     }
 
     /// Flags for formatting
@@ -2308,7 +2312,7 @@ impl Write for Formatter<'_> {
 
     #[inline]
     fn write_fmt(&mut self, args: Arguments<'_>) -> Result {
-        if let Some(s) = args.as_const_str() {
+        if let Some(s) = args.as_statically_known_str() {
             self.buf.write_str(s)
         } else {
             write(self.buf, args)
diff --git a/library/std/src/lib.rs b/library/std/src/lib.rs
index c457c39e0c11c..dc5a8704498d5 100644
--- a/library/std/src/lib.rs
+++ b/library/std/src/lib.rs
@@ -328,6 +328,7 @@
 #![feature(float_gamma)]
 #![feature(float_minimum_maximum)]
 #![feature(float_next_up_down)]
+#![feature(fmt_internals)]
 #![feature(generic_nonzero)]
 #![feature(hasher_prefixfree_extras)]
 #![feature(hashmap_internals)]
diff --git a/library/std/src/panicking.rs b/library/std/src/panicking.rs
index e6e1d32fa54f8..31dbe86b66c70 100644
--- a/library/std/src/panicking.rs
+++ b/library/std/src/panicking.rs
@@ -391,6 +391,7 @@ pub mod panic_count {
     pub fn increase(run_panic_hook: bool) -> Option<MustAbort> {
         let global_count = GLOBAL_PANIC_COUNT.fetch_add(1, Ordering::Relaxed);
         if global_count & ALWAYS_ABORT_FLAG != 0 {
+            // Do *not* access thread-local state, we might be after a `fork`.
             return Some(MustAbort::AlwaysAbort);
         }
 
@@ -744,11 +745,14 @@ fn rust_panic_with_hook(
     if let Some(must_abort) = must_abort {
         match must_abort {
             panic_count::MustAbort::PanicInHook => {
-                // Don't try to print the message in this case
-                // - perhaps that is causing the recursive panics.
+                // Don't try to format the message in this case, perhaps that is causing the
+                // recursive panics. However if the message is just a string, no user-defined
+                // code is involved in printing it, so that is risk-free.
+                let msg_str = message.and_then(|m| m.as_str()).map(|m| [m]);
+                let message = msg_str.as_ref().map(|m| fmt::Arguments::new_const(m));
                 let panicinfo = PanicInfo::internal_constructor(
-                    None,     // no message
-                    location, // but we want to show the location!
+                    message.as_ref(),
+                    location,
                     can_unwind,
                     force_no_backtrace,
                 );
@@ -756,7 +760,7 @@ fn rust_panic_with_hook(
             }
             panic_count::MustAbort::AlwaysAbort => {
                 // Unfortunately, this does not print a backtrace, because creating
-                // a `Backtrace` will allocate, which we must to avoid here.
+                // a `Backtrace` will allocate, which we must avoid here.
                 let panicinfo = PanicInfo::internal_constructor(
                     message,
                     location,
diff --git a/library/std/src/sys/pal/unix/net.rs b/library/std/src/sys/pal/unix/net.rs
index 1f140f7844f7c..9a0a1b18aee0d 100644
--- a/library/std/src/sys/pal/unix/net.rs
+++ b/library/std/src/sys/pal/unix/net.rs
@@ -459,7 +459,7 @@ impl Socket {
             const AF_NAME_MAX: usize = 16;
             let mut buf = [0; AF_NAME_MAX];
             for (src, dst) in name.to_bytes().iter().zip(&mut buf[..AF_NAME_MAX - 1]) {
-                *dst = *src as i8;
+                *dst = *src as libc::c_char;
             }
             let mut arg: libc::accept_filter_arg = unsafe { mem::zeroed() };
             arg.af_name = buf;
diff --git a/library/std/src/sys/pal/unix/thread.rs b/library/std/src/sys/pal/unix/thread.rs
index 6520ca9fc48ef..a3e1b6782e8a8 100644
--- a/library/std/src/sys/pal/unix/thread.rs
+++ b/library/std/src/sys/pal/unix/thread.rs
@@ -355,8 +355,6 @@ pub fn available_parallelism() -> io::Result<NonZero<usize>> {
             target_os = "tvos",
             target_os = "linux",
             target_os = "macos",
-            target_os = "solaris",
-            target_os = "illumos",
             target_os = "aix",
         ))] {
             #[allow(unused_assignments)]
@@ -483,6 +481,12 @@ pub fn available_parallelism() -> io::Result<NonZero<usize>> {
                         .ok_or(io::const_io_error!(io::ErrorKind::NotFound, "The number of hardware threads is not known for the target platform"))
                 }
             }
+        } else if #[cfg(any(target_os = "solaris", target_os = "illumos"))] {
+            let mut cpus = 0u32;
+            if unsafe { libc::pset_info(libc::PS_MYID, core::ptr::null_mut(), &mut cpus, core::ptr::null_mut()) } != 0 {
+                return Err(io::const_io_error!(io::ErrorKind::NotFound, "The number of hardware threads is not known for the target platform"));
+            }
+            Ok(unsafe { NonZero::new_unchecked(cpus as usize) })
         } else if #[cfg(target_os = "haiku")] {
             // system_info cpu_count field gets the static data set at boot time with `smp_set_num_cpus`
             // `get_system_info` calls then `smp_get_num_cpus`
diff --git a/src/tools/compiletest/src/lib.rs b/src/tools/compiletest/src/lib.rs
index ef02e7fcb4abb..b791b38379f9c 100644
--- a/src/tools/compiletest/src/lib.rs
+++ b/src/tools/compiletest/src/lib.rs
@@ -609,6 +609,8 @@ fn common_inputs_stamp(config: &Config) -> Stamp {
         stamp.add_path(&rust_src_dir.join("src/etc/htmldocck.py"));
     }
 
+    stamp.add_dir(&rust_src_dir.join("src/tools/run-make-support"));
+
     // Compiletest itself.
     stamp.add_dir(&rust_src_dir.join("src/tools/compiletest/"));
 
diff --git a/src/tools/rustfmt/src/parse/session.rs b/src/tools/rustfmt/src/parse/session.rs
index cb46e65999df6..1a39d212386bd 100644
--- a/src/tools/rustfmt/src/parse/session.rs
+++ b/src/tools/rustfmt/src/parse/session.rs
@@ -121,6 +121,7 @@ fn default_dcx(
             fallback_bundle,
             fatal_dcx: DiagCtxt::new(emitter),
             fatal_note: None,
+            emit_fatal_diagnostic: false,
         })
     } else {
         emitter
@@ -209,7 +210,7 @@ impl ParseSess {
             rustc_driver::DEFAULT_LOCALE_RESOURCES.to_vec(),
             false,
         );
-        self.raw_psess.dcx.make_silent(fallback_bundle, None);
+        self.raw_psess.dcx.make_silent(fallback_bundle, None, false);
     }
 
     pub(crate) fn span_to_filename(&self, span: Span) -> FileName {
diff --git a/tests/ui/panics/panic-in-message-fmt.run.stderr b/tests/ui/panics/panic-in-message-fmt.run.stderr
index c3a5733c8ae3f..46829c33a5466 100644
--- a/tests/ui/panics/panic-in-message-fmt.run.stderr
+++ b/tests/ui/panics/panic-in-message-fmt.run.stderr
@@ -1,2 +1,3 @@
 panicked at $DIR/panic-in-message-fmt.rs:18:9:
+not yet implemented
 thread panicked while processing panic. aborting.
diff --git a/tests/ui/polymorphization/ice-poly-with-mir-opts-90192.rs b/tests/ui/polymorphization/ice-poly-with-mir-opts-90192.rs
new file mode 100644
index 0000000000000..4557c7e517ceb
--- /dev/null
+++ b/tests/ui/polymorphization/ice-poly-with-mir-opts-90192.rs
@@ -0,0 +1,20 @@
+// issue: rust-lang/rust#90192
+// ICE assertion failed: matches!(ty.kind(), ty :: Param(_))
+//@ compile-flags:-Zpolymorphize=on -Zmir-opt-level=3
+//@ build-pass
+
+fn test<T>() {
+    std::mem::size_of::<T>();
+}
+
+pub fn foo<T>(_: T) -> &'static fn() {
+    &(test::<T> as fn())
+}
+
+fn outer<T>() {
+    foo(|| ());
+}
+
+fn main() {
+    outer::<u8>();
+}
diff --git a/tests/ui/privacy/pub-priv-dep/auxiliary/bar.rs b/tests/ui/privacy/pub-priv-dep/auxiliary/bar.rs
new file mode 100644
index 0000000000000..58297c926932b
--- /dev/null
+++ b/tests/ui/privacy/pub-priv-dep/auxiliary/bar.rs
@@ -0,0 +1,6 @@
+//@ aux-crate:priv:foo=foo.rs
+//@ compile-flags: -Zunstable-options
+
+#![crate_type = "rlib"]
+extern crate foo;
+pub struct Bar(pub i32);
diff --git a/tests/ui/privacy/pub-priv-dep/auxiliary/foo.rs b/tests/ui/privacy/pub-priv-dep/auxiliary/foo.rs
new file mode 100644
index 0000000000000..6fd950619e6d8
--- /dev/null
+++ b/tests/ui/privacy/pub-priv-dep/auxiliary/foo.rs
@@ -0,0 +1,2 @@
+#![crate_type = "rlib"]
+pub struct Foo(pub i32);
diff --git a/tests/ui/privacy/pub-priv-dep/priv-dep-issue-122756.rs b/tests/ui/privacy/pub-priv-dep/priv-dep-issue-122756.rs
new file mode 100644
index 0000000000000..d7ade7f0e96c5
--- /dev/null
+++ b/tests/ui/privacy/pub-priv-dep/priv-dep-issue-122756.rs
@@ -0,0 +1,12 @@
+//@ aux-build: bar.rs
+//@ aux-build: foo.rs
+//@ build-pass
+
+#![deny(exported_private_dependencies)]
+
+// Ensure the libbar.rlib is loaded first. If the command line parameter `--extern foo` does not
+// exist, previus version would fail to compile
+#![crate_type = "rlib"]
+extern crate bar;
+extern crate foo;
+pub fn baz() -> (Option<foo::Foo>, Option<bar::Bar>) { (None, None) }
diff --git a/tests/ui/type-alias-impl-trait/tait-param-inference-issue-117310.rs b/tests/ui/type-alias-impl-trait/tait-param-inference-issue-117310.rs
new file mode 100644
index 0000000000000..be743e8e27003
--- /dev/null
+++ b/tests/ui/type-alias-impl-trait/tait-param-inference-issue-117310.rs
@@ -0,0 +1,28 @@
+//@ check-pass
+
+#![feature(type_alias_impl_trait)]
+#![allow(dead_code)]
+
+use std::ops::Deref;
+
+trait Trait {}
+impl<A, B> Trait for (A, B, u8) where A: Deref, B: Deref<Target = A::Target>, {}
+impl<A, B> Trait for (A, B, i8) {}
+
+type TaitSized = impl Sized;
+fn def_tait1() -> TaitSized {}
+
+type TaitCopy = impl Copy;
+fn def_tait2() -> TaitCopy {}
+
+fn impl_trait<T: Trait> () {}
+
+fn test() {
+    impl_trait::<(&TaitSized, &TaitCopy, _)>();
+    impl_trait::<(&TaitCopy, &TaitSized, _)>();
+
+    impl_trait::<(&TaitCopy, &String, _)>();
+    impl_trait::<(&TaitSized, &String, _)>();
+}
+
+fn main() {}