我在调用函数unit_thread_data\xef\xbc\x8c时出现段错误，实际上它是由~Data()引起的。thread1没问题，但是thread2导致了段错误，整个代码如下：（请原谅糟糕的代码风格），错误信息是双重释放或损坏。其他信息：gcc5.4.0、centos7。有什么帮助吗？非常感谢！
\n#include <iostream>\n#include <pthread.h>\n#include <unistd.h>\nusing namespace std;\nclass Data\n{\npublic:\n int* A_;\n Data()\n {\n cout<<"111\\n";\n A_=NULL;\n }\n ~Data()\n {\n cout<<"222\\n";\n if(A_) {\n delete A_;\n }\n }\n};\n\nstruct thread_data_t\n{\n Data* d;\n};\n\nvoid* _add(void* _pthread_data)\n{\n thread_data_t* pthread_data = (thread_data_t*) _pthread_data;\n pthread_data->d->A_ = new int[2];\n pthread_data->d->A_[0] = 1;\n pthread_data->d->A_[1] = 2;\n std::cout<<pthread_data->d->A_[0]+pthread_data->d->A_[1]<<endl;\n return (void*)0;\n}\n\nvoid unit_thread_data(thread_data_t* pthread_data)\n{\n for(int i=0;i<2;i++)\n {\n delete[] pthread_data[i].d->A_;\n delete pthread_data[i].d;\n }\n delete[] pthread_data;\n}\nint main()\n{\n int num_threads = 2;\n pthread_t threads[num_threads];\n thread_data_t* pthread_data = new thread_data_t[num_threads];\n for(int i=0;i<num_threads; i++)\n {\n pthread_data[i].d = new Data();\n …