4 files changed, 20 insertions, 8 deletions

diff --git a/compiler/rustc_errors/src/diagnostic_builder.rs b/compiler/rustc_errors/src/diagnostic_builder.rs
index ef528d87cb2..db97d96fccd 100644
--- a/compiler/rustc_errors/src/diagnostic_builder.rs
+++ b/compiler/rustc_errors/src/diagnostic_builder.rs
@@ -571,6 +571,14 @@ impl<'a, G: EmissionGuarantee> DiagnosticBuilder<'a, G> {
         Some((diagnostic, handler))
     }
 
+    /// Retrieves the [`Handler`] if available
+    pub fn handler(&self) -> Option<&Handler> {
+        match self.inner.state {
+            DiagnosticBuilderState::Emittable(handler) => Some(handler),
+            DiagnosticBuilderState::AlreadyEmittedOrDuringCancellation => None,
+        }
+    }
+
     /// Buffers the diagnostic for later emission,
     /// unless handler has disabled such buffering.
     pub fn buffer(self, buffered_diagnostics: &mut Vec<Diagnostic>) {
diff --git a/compiler/rustc_errors/src/lib.rs b/compiler/rustc_errors/src/lib.rs
index fcbd9a53b48..0f360473619 100644
--- a/compiler/rustc_errors/src/lib.rs
+++ b/compiler/rustc_errors/src/lib.rs
@@ -32,7 +32,7 @@ use emitter::{is_case_difference, Emitter, EmitterWriter};
 use registry::Registry;
 use rustc_data_structures::fx::{FxHashMap, FxHashSet, FxIndexMap, FxIndexSet};
 use rustc_data_structures::stable_hasher::{Hash128, StableHasher};
-use rustc_data_structures::sync::{self, Lock, Lrc};
+use rustc_data_structures::sync::{self, IntoDynSyncSend, Lock, Lrc};
 use rustc_data_structures::AtomicRef;
 pub use rustc_error_messages::{
     fallback_fluent_bundle, fluent_bundle, DelayDm, DiagnosticMessage, FluentBundle,
@@ -409,7 +409,7 @@ struct HandlerInner {
     err_count: usize,
     warn_count: usize,
     deduplicated_err_count: usize,
-    emitter: Box<dyn Emitter + sync::Send>,
+    emitter: IntoDynSyncSend<Box<dyn Emitter + sync::Send>>,
     delayed_span_bugs: Vec<DelayedDiagnostic>,
     delayed_good_path_bugs: Vec<DelayedDiagnostic>,
     /// This flag indicates that an expected diagnostic was emitted and suppressed.
@@ -478,6 +478,7 @@ pub enum StashKey {
     /// FRU syntax
     MaybeFruTypo,
     CallAssocMethod,
+    TraitMissingMethod,
 }
 
 fn default_track_diagnostic(d: &mut Diagnostic, f: &mut dyn FnMut(&mut Diagnostic)) {
@@ -605,7 +606,7 @@ impl Handler {
                 warn_count: 0,
                 deduplicated_err_count: 0,
                 deduplicated_warn_count: 0,
-                emitter,
+                emitter: IntoDynSyncSend(emitter),
                 delayed_span_bugs: Vec::new(),
                 delayed_good_path_bugs: Vec::new(),
                 suppressed_expected_diag: false,
diff --git a/compiler/rustc_errors/src/lock.rs b/compiler/rustc_errors/src/lock.rs
index 7db262abfde..bd5cf49b56b 100644
--- a/compiler/rustc_errors/src/lock.rs
+++ b/compiler/rustc_errors/src/lock.rs
@@ -19,8 +19,7 @@ pub fn acquire_global_lock(name: &str) -> Box<dyn Any> {
     use windows::{
         core::PCSTR,
         Win32::Foundation::{CloseHandle, HANDLE, WAIT_ABANDONED, WAIT_OBJECT_0},
-        Win32::System::Threading::{CreateMutexA, ReleaseMutex, WaitForSingleObject},
-        Win32::System::WindowsProgramming::INFINITE,
+        Win32::System::Threading::{CreateMutexA, ReleaseMutex, WaitForSingleObject, INFINITE},
     };
 
     struct Handle(HANDLE);
diff --git a/compiler/rustc_errors/src/tests.rs b/compiler/rustc_errors/src/tests.rs
index 52103e46097..0e729b71680 100644
--- a/compiler/rustc_errors/src/tests.rs
+++ b/compiler/rustc_errors/src/tests.rs
@@ -2,7 +2,7 @@ use crate::error::{TranslateError, TranslateErrorKind};
 use crate::fluent_bundle::*;
 use crate::translation::Translate;
 use crate::FluentBundle;
-use rustc_data_structures::sync::Lrc;
+use rustc_data_structures::sync::{IntoDynSyncSend, Lrc};
 use rustc_error_messages::fluent_bundle::resolver::errors::{ReferenceKind, ResolverError};
 use rustc_error_messages::langid;
 use rustc_error_messages::DiagnosticMessage;
@@ -27,10 +27,14 @@ fn make_dummy(ftl: &'static str) -> Dummy {
     let langid_en = langid!("en-US");
 
     #[cfg(parallel_compiler)]
-    let mut bundle = FluentBundle::new_concurrent(vec![langid_en]);
+    let mut bundle: FluentBundle =
+        IntoDynSyncSend(crate::fluent_bundle::bundle::FluentBundle::new_concurrent(vec![
+            langid_en,
+        ]));
 
     #[cfg(not(parallel_compiler))]
-    let mut bundle = FluentBundle::new(vec![langid_en]);
+    let mut bundle: FluentBundle =
+        IntoDynSyncSend(crate::fluent_bundle::bundle::FluentBundle::new(vec![langid_en]));
 
     bundle.add_resource(resource).expect("Failed to add FTL resources to the bundle.");