UPDATE - into_diagnostic to take a Handler instead of a ParseSess

Suggested by the team in this Zulip Topic https://rust-lang.zulipchat.com/#narrow/stream/336883-i18n/topic/.23100717.20SessionDiagnostic.20on.20Handler

Handler already has almost all the capabilities of ParseSess when it comes to diagnostic emission, in this migration we only needed to add the ability to access source_map from the emitter in order to get a Snippet and the start_point. Not sure if this is the best way to address this gap

1 files changed, 4 insertions, 4 deletions

diff --git a/compiler/rustc_lint/src/errors.rs b/compiler/rustc_lint/src/errors.rs
index 606d8bda8aa..5c183d4091e 100644
--- a/compiler/rustc_lint/src/errors.rs
+++ b/compiler/rustc_lint/src/errors.rs
@@ -1,6 +1,6 @@
-use rustc_errors::{fluent, AddSubdiagnostic, ErrorGuaranteed};
+use rustc_errors::{fluent, AddSubdiagnostic, ErrorGuaranteed, Handler};
 use rustc_macros::{SessionDiagnostic, SessionSubdiagnostic};
-use rustc_session::{lint::Level, parse::ParseSess, SessionDiagnostic};
+use rustc_session::{lint::Level, SessionDiagnostic};
 use rustc_span::{Span, Symbol};
 
 #[derive(SessionDiagnostic)]
@@ -122,9 +122,9 @@ pub struct CheckNameUnknown {
 impl SessionDiagnostic<'_> for CheckNameUnknown {
     fn into_diagnostic(
         self,
-        sess: &ParseSess,
+        handler: &Handler,
     ) -> rustc_errors::DiagnosticBuilder<'_, ErrorGuaranteed> {
-        let mut diag = sess.struct_err(fluent::lint::check_name_unknown);
+        let mut diag = handler.struct_err(fluent::lint::check_name_unknown);
         diag.code(rustc_errors::error_code!(E0602));
         if let Some(suggestion) = self.suggestion {
             diag.help(fluent::lint::help);