c语言 - 恶意指针上偶尔出现分段错误

我有以下代码，其中每当我试图释放malloc’ed内存时，有时会出现分段错误。这个错误只发生在释放与我的一些结构成员相关联的内存时(仅在昵称和其他成员上(，这意味着我从未得到free(player->name)的分段错误，但大约有一半的时间我从其他两个释放中得到分段错误(看看仪器是空的，它没有影响(

typedef struct player_t {
    char * name;
    char * nickname;
    Instrument * instruments;
    int instrumentAmount;
} * Player;
Player playerCreate(const char* name, const char* nickname,
int maxInstruments) {
    Player one=malloc(sizeof(Player));
    if(one==NULL || !checkLegalName(name)|| !checkLegalName(nickname) ||   maxInstruments<=0) {
        return NULL;
    }
    one->name=malloc(strlen(name)+1);
    one->nickname=malloc(strlen(name)+1);
    if(!one->name || !one->nickname) {
        playerDestroy(one);
        return NULL;
    }
    strcpy(one->name,name);
    strcpy(one->nickname,nickname);
    one->instrumentAmount=maxInstruments;
    one->instruments=NULL;
    return one;
}

然后是：

void playerDestroy(Player player) {
    if( !player) {
        return;
    }
    free(player->name);
    free(player->nickname); // this is where it happens.
    free(player->instruments);
    free(player);
}

如有任何帮助，我们将不胜感激。