message: bug: fixed the issue with GCC7
diff: @@ -6381,7 +6381,7 @@ class basic_json
  {
  case value_t::array:
  {
  - return *lhs.m_value.array < *rhs.m_value.array;
  + return (*lhs.m_value.array) < (*rhs.m_value.array);
  }
  case value_t::object:
  {
  