message: Fix multithread crash
diff: @@ -1444,7 +1444,8 @@ std::vector<std::unique_ptr<IndexedFile>> Parse(FileConsumer::SharedState* file_
  clang::Index index(0 /*excludeDeclarationsFromPCH*/,
  0 /*displayDiagnostics*/);
  - clang::TranslationUnit tu(index, filename, args, {} /*unsaved_files*/, CXTranslationUnit_KeepGoing);
  + std::vector<CXUnsavedFile> unsaved_files;
  + clang::TranslationUnit tu(index, filename, args, unsaved_files, CXTranslationUnit_KeepGoing);
  if (dump_ast)
  Dump(tu.document_cursor());
  