Add missing `DiagnosticBuilder::eager_diagnostic` method.

This lets us avoid the use of `DiagnosticBuilder::into_diagnostic` in
miri, when then means that `DiagnosticBuilder::into_diagnostic` can
become private, being now only used by `stash` and `buffer`.

1 files changed, 5 insertions, 1 deletions

diff --git a/compiler/rustc_errors/src/diagnostic_builder.rs b/compiler/rustc_errors/src/diagnostic_builder.rs
index 1f0a10c13b7..a02909f29c4 100644
--- a/compiler/rustc_errors/src/diagnostic_builder.rs
+++ b/compiler/rustc_errors/src/diagnostic_builder.rs
@@ -265,7 +265,7 @@ impl<'a, G: EmissionGuarantee> DiagnosticBuilder<'a, G> {
 
     /// Converts the builder to a `Diagnostic` for later emission,
     /// unless dcx has disabled such buffering.
-    pub fn into_diagnostic(mut self) -> Option<(Diagnostic, &'a DiagCtxt)> {
+    fn into_diagnostic(mut self) -> Option<(Diagnostic, &'a DiagCtxt)> {
         if self.dcx.inner.lock().flags.treat_err_as_bug.is_some() {
             self.emit();
             return None;
@@ -426,6 +426,10 @@ impl<'a, G: EmissionGuarantee> DiagnosticBuilder<'a, G> {
     forward!((subdiagnostic, with_subdiagnostic)(
         subdiagnostic: impl crate::AddToDiagnostic,
     ));
+    forward!((eager_subdiagnostic, with_eager_subdiagnostic)(
+        dcx: &DiagCtxt,
+        subdiagnostic: impl crate::AddToDiagnostic,
+    ));
 }
 
 impl<G: EmissionGuarantee> Debug for DiagnosticBuilder<'_, G> {