2 files changed, 15 insertions, 0 deletions
diff --git a/compiler/rustc_interface/src/tests.rs b/compiler/rustc_interface/src/tests.rs
index a3570320767..fe75ee8b37b 100644
--- a/compiler/rustc_interface/src/tests.rs
+++ b/compiler/rustc_interface/src/tests.rs
@@ -44,6 +44,7 @@ fn mk_session(matches: getopts::Matches) -> (Session, CfgSpecs) {
     let sess = build_session(
         sessopts,
         None,
+        None,
         registry,
         DiagnosticOutput::Default,
         Default::default(),
diff --git a/compiler/rustc_interface/src/util.rs b/compiler/rustc_interface/src/util.rs
index 592cf60e6c3..3fa8017dc93 100644
--- a/compiler/rustc_interface/src/util.rs
+++ b/compiler/rustc_interface/src/util.rs
@@ -83,9 +83,23 @@ pub fn create_session(
     // target_override is documented to be called before init(), so this is okay
     let target_override = codegen_backend.target_override(&sopts);
 
+    let bundle = match rustc_errors::fluent_bundle(
+        sopts.maybe_sysroot.clone(),
+        sysroot_candidates(),
+        sopts.debugging_opts.translate_lang.clone(),
+        sopts.debugging_opts.translate_additional_ftl.as_deref(),
+        sopts.debugging_opts.translate_directionality_markers,
+    ) {
+        Ok(bundle) => bundle,
+        Err(e) => {
+            early_error(sopts.error_format, &format!("failed to load fluent bundle: {e}"));
+        }
+    };
+
     let mut sess = session::build_session(
         sopts,
         input_path,
+        bundle,
         descriptions,
         diagnostic_output,
         lint_caps,