Auto merge of #126623 - oli-obk:do_not_count_errors, r=davidtwco

Replace all `&DiagCtxt` with a `DiagCtxtHandle<'_>` wrapper type

r? `@davidtwco`

This paves the way for tracking more state (e.g. error tainting) in the diagnostic context handle

Basically I will add a field to the `DiagCtxtHandle` that refers back to the `InferCtxt`'s (and others) `Option<ErrorHandled>`, allowing us to immediately taint these contexts when emitting an error and not needing manual tainting anymore (which is easy to forget and we don't do in general anyway)

1 files changed, 4 insertions, 2 deletions

diff --git a/compiler/rustc_middle/src/ty/context.rs b/compiler/rustc_middle/src/ty/context.rs
index e2f15dac019..7a804c23638 100644
--- a/compiler/rustc_middle/src/ty/context.rs
+++ b/compiler/rustc_middle/src/ty/context.rs
@@ -47,7 +47,9 @@ use rustc_data_structures::sync::{self, FreezeReadGuard, Lock, Lrc, RwLock, Work
 #[cfg(parallel_compiler)]
 use rustc_data_structures::sync::{DynSend, DynSync};
 use rustc_data_structures::unord::UnordSet;
-use rustc_errors::{Applicability, Diag, DiagCtxt, ErrorGuaranteed, LintDiagnostic, MultiSpan};
+use rustc_errors::{
+    Applicability, Diag, DiagCtxtHandle, ErrorGuaranteed, LintDiagnostic, MultiSpan,
+};
 use rustc_hir as hir;
 use rustc_hir::def::DefKind;
 use rustc_hir::def_id::{CrateNum, DefId, LocalDefId, LOCAL_CRATE};
@@ -1415,7 +1417,7 @@ impl<'tcx> TyCtxt<'tcx> {
         )
     }
 
-    pub fn dcx(self) -> &'tcx DiagCtxt {
+    pub fn dcx(self) -> DiagCtxtHandle<'tcx> {
         self.sess.dcx()
     }
 }