text: // RUN: %check_clang_tidy %s performance-unnecessary-value-param %t -- -fix-errors
  
  // Ensure that incomplete types result in an error from the frontend and not a
  // clang-tidy diagnostic about IncompleteType being expensive to copy.
  struct IncompleteType;
  void NegativeForIncompleteType(IncompleteType I) {
    // CHECK-MESSAGES: [[@LINE-1]]:47: error: variable has incomplete type 'IncompleteType' [clang-diagnostic-error]
  }
  
  