Attempted fix for regression caused by previous commit

Author: Aversefun

library/proc_macro/src/backend/mod.rs

@@ -1,7 +1,6 @@
+pub(crate) mod arena;
 pub mod bridge;
+pub(crate) mod fxhash;
 
 #[allow(unsafe_code)]
-pub(self) mod arena;
-
-#[forbid(unsafe_code)]
-pub(self) mod fxhash;
+pub use bridge::*;

library/proc_macro/src/diagnostic.rs

@@ -163,15 +163,15 @@ impl Diagnostic {
     pub fn emit(self) {
         fn to_internal(
             diag: Diagnostic,
-        ) -> crate::backend::bridge::Diagnostic<crate::backend::bridge::client::Span> {
-            crate::backend::bridge::Diagnostic {
+        ) -> crate::backend::Diagnostic<crate::backend::client::Span> {
+            crate::backend::Diagnostic {
                 level: diag.level,
                 message: diag.message,
                 spans: diag.spans.into_iter().map(|s| s.0).collect(),
                 children: diag.children.into_iter().map(to_internal).collect(),
             }
         }
 
-        crate::backend::bridge::client::FreeFunctions::emit_diagnostic(to_internal(self));
+        crate::backend::client::FreeFunctions::emit_diagnostic(to_internal(self));
     }
 }