src/Pure/Isar/session.ML

       Present.init build info doc doc_graph doc_versions (path ()) name
         (dumping dump) (get_rpath rpath) verbose (map ThyInfo.theory (ThyInfo.names ()));
       Secure.use_noncritical root;
       finish ()))
     |> setmp_noncritical Proofterm.proofs level
-    |> setmp_noncritical print_mode (modes @ ! print_mode)
+    |> setmp_noncritical print_mode (modes @ print_mode_value ())
     |> setmp_noncritical Multithreading.trace trace_threads
     |> setmp_noncritical Multithreading.max_threads
       (if Multithreading.available then max_threads
        else (if max_threads = 1 then () else warning "Multithreading support unavailable"; 1))) ()
   handle exn => (Output.error_msg (Toplevel.exn_message exn); exit 1);