3 files changed, 11 insertions, 12 deletions
diff --git a/compiler/rustc_builtin_macros/src/errors.rs b/compiler/rustc_builtin_macros/src/errors.rs
index 0523f9acd62..6ffeb401453 100644
--- a/compiler/rustc_builtin_macros/src/errors.rs
+++ b/compiler/rustc_builtin_macros/src/errors.rs
@@ -448,12 +448,12 @@ pub(crate) struct EnvNotDefinedWithUserMessage {
 // Hand-written implementation to support custom user messages.
 impl<'a> IntoDiagnostic<'a> for EnvNotDefinedWithUserMessage {
     #[track_caller]
-    fn into_diagnostic(self, handler: &'a DiagCtxt) -> DiagnosticBuilder<'a, ErrorGuaranteed> {
+    fn into_diagnostic(self, dcx: &'a DiagCtxt) -> DiagnosticBuilder<'a, ErrorGuaranteed> {
         #[expect(
             rustc::untranslatable_diagnostic,
             reason = "cannot translate user-provided messages"
         )]
-        let mut diag = handler.struct_err(self.msg_from_user.to_string());
+        let mut diag = dcx.struct_err(self.msg_from_user.to_string());
         diag.set_span(self.span);
         diag
     }
@@ -802,17 +802,16 @@ pub(crate) struct AsmClobberNoReg {
 }
 
 impl<'a> IntoDiagnostic<'a> for AsmClobberNoReg {
-    fn into_diagnostic(self, handler: &'a DiagCtxt) -> DiagnosticBuilder<'a, ErrorGuaranteed> {
-        let mut diag =
-            handler.struct_err(crate::fluent_generated::builtin_macros_asm_clobber_no_reg);
+    fn into_diagnostic(self, dcx: &'a DiagCtxt) -> DiagnosticBuilder<'a, ErrorGuaranteed> {
+        let mut diag = dcx.struct_err(crate::fluent_generated::builtin_macros_asm_clobber_no_reg);
         diag.set_span(self.spans.clone());
         // eager translation as `span_labels` takes `AsRef<str>`
-        let lbl1 = handler.eagerly_translate_to_string(
+        let lbl1 = dcx.eagerly_translate_to_string(
             crate::fluent_generated::builtin_macros_asm_clobber_abi,
             [].into_iter(),
         );
         diag.span_labels(self.clobbers, &lbl1);
-        let lbl2 = handler.eagerly_translate_to_string(
+        let lbl2 = dcx.eagerly_translate_to_string(
             crate::fluent_generated::builtin_macros_asm_clobber_outputs,
             [].into_iter(),
         );
diff --git a/compiler/rustc_builtin_macros/src/proc_macro_harness.rs b/compiler/rustc_builtin_macros/src/proc_macro_harness.rs
index 6539d120698..4fddaa8ab6c 100644
--- a/compiler/rustc_builtin_macros/src/proc_macro_harness.rs
+++ b/compiler/rustc_builtin_macros/src/proc_macro_harness.rs
@@ -52,7 +52,7 @@ pub fn inject(
     is_proc_macro_crate: bool,
     has_proc_macro_decls: bool,
     is_test_crate: bool,
-    handler: &rustc_errors::DiagCtxt,
+    dcx: &rustc_errors::DiagCtxt,
 ) {
     let ecfg = ExpansionConfig::default("proc_macro".to_string(), features);
     let mut cx = ExtCtxt::new(sess, ecfg, resolver, None);
@@ -60,7 +60,7 @@ pub fn inject(
     let mut collect = CollectProcMacros {
         macros: Vec::new(),
         in_root: true,
-        dcx: handler,
+        dcx,
         source_map: sess.source_map(),
         is_proc_macro_crate,
         is_test_crate,
diff --git a/compiler/rustc_builtin_macros/src/test_harness.rs b/compiler/rustc_builtin_macros/src/test_harness.rs
index 6fbbef1eda8..ff8d8e43525 100644
--- a/compiler/rustc_builtin_macros/src/test_harness.rs
+++ b/compiler/rustc_builtin_macros/src/test_harness.rs
@@ -389,7 +389,7 @@ fn get_test_name(i: &ast::Item) -> Option<Symbol> {
     attr::first_attr_value_str_by_name(&i.attrs, sym::rustc_test_marker)
 }
 
-fn get_test_runner(sd: &rustc_errors::DiagCtxt, krate: &ast::Crate) -> Option<ast::Path> {
+fn get_test_runner(dcx: &rustc_errors::DiagCtxt, krate: &ast::Crate) -> Option<ast::Path> {
     let test_attr = attr::find_by_name(&krate.attrs, sym::test_runner)?;
     let meta_list = test_attr.meta_item_list()?;
     let span = test_attr.span;
@@ -397,11 +397,11 @@ fn get_test_runner(sd: &rustc_errors::DiagCtxt, krate: &ast::Crate) -> Option<as
         [single] => match single.meta_item() {
             Some(meta_item) if meta_item.is_word() => return Some(meta_item.path.clone()),
             _ => {
-                sd.emit_err(errors::TestRunnerInvalid { span });
+                dcx.emit_err(errors::TestRunnerInvalid { span });
             }
         },
         _ => {
-            sd.emit_err(errors::TestRunnerNargs { span });
+            dcx.emit_err(errors::TestRunnerNargs { span });
         }
     }
     None