// each op in the module and runs the pass on them, may be in async mode.
  void runBeforePass(Pass *pass, Operation *module) override;
  void runAfterPass(Pass *pass, Operation *module) override;
  void runAfterPassFailed(Pass *pass, Operation *module) override;

  // The handler to capture error messages.
  std::unique_ptr<ScopedDiagnosticHandler> handler_;
  // A map from location to op name.

  loc_to_name_.clear();
  pass_name_.clear();
  common_error_message_.clear();
  error_collector_->Clear();
}

void ErrorCollectorInstrumentation::runAfterPassFailed(Pass *pass,
                                                       Operation *module) {
  // Create a new error if no errors collected yet.
  if (error_collector_->CollectedErrors().empty() &&