message: [SwiftLanguageRuntime] Try to be more defensive.
  <rdar://problem/47348115>
diff: @@ -129,6 +129,8 @@ void SwiftLanguageRuntime::SetupReflection() {
  auto &target = m_process->GetTarget();
  auto M = target.GetExecutableModule();
  + if (!M)
  + return;
  auto *obj_file = M->GetObjectFile();
  if (!obj_file)
  return;
  