return std::string("CommWait(comm_id:") + ptr_to_id<activity::CommImpl const>(comm) +
" src:" + std::to_string(comm->src_actor_ != nullptr ? comm->src_actor_->get_pid() : -1) +
" dst:" + std::to_string(comm->dst_actor_ != nullptr ? comm->dst_actor_->get_pid() : -1) +
- " mbox:" + std::string(comm->get_mailbox() == nullptr ? xbt::string("-") : comm->get_mailbox()->get_name()) +
+ " mbox:" + std::string(comm->get_mailbox() == nullptr ? std::string("-") : comm->get_mailbox()->get_name()) +
"(id:" + std::to_string(comm->get_mailbox_id()) + ") srcbuf:" + src_buff_id + " dstbuf:" + dst_buff_id +
" bufsize:" + std::to_string(comm->src_buff_size_) + ")";
} else {