Segmentation Fault Accessing Singleton C++ - c++

Question

Overview
I am writing a helper class to make calls to Redis easier with the xRedis drivers in C++, but I am continually receiving a segmentation fault upon requesting or sending any information to the instance.
I think this has to do with the way I'm storing the xRedis and RedisDBIdx instances, and possibly the way I'm storing the RedisAdmin instance within the main application, but I'm unable to see the right way to set these up after several attempts.
Relevant Code is below, and a few notes on debugging steps I have taken myself.
Debugging Notes
Redis Server is started successfully, and log output shows successful connection to server on instance startup
The call fails whether a set or exists command is sent to the server
GDB Output shows below, and logs show the same happenning on either exists or set calls:
Program received signal SIGSEGV, Segmentation fault.
RedisPool::GetConnection (this=0x0, cahcetype=0, dbindex=0, ioType=0) at src/xRedisPool.cpp:124
124 || (ioType>SLAVE)
Code
redis_admin.h
#include "xredis/xRedisClient.h"
#include <string.h>
#include <string>
class xRedisAdmin
{
xRedisClient xRed;
public:
xRedisAdmin(RedisNode conn_list[], int conn_list_size);
~xRedisAdmin();
const char * load ( const char * key );
bool save ( const char * key, const char * msg );
bool exists ( const char * key );
bool del ( const char * key );
};
redis_admin.cpp
xRedisAdmin::xRedisAdmin(RedisNode conn_list[], int conn_list_size)
{
enum {
CACHE_TYPE_1,
CACHE_TYPE_2,
CACHE_TYPE_MAX,
};
xRed.Init(CACHE_TYPE_MAX);
bool bret = xRed.ConnectRedisCache(conn_list, conn_list_size, CACHE_TYPE_1);
//Log results
}
//Exists
bool xRedisAdmin::exists(const char * key)
{
RedisDBIdx d(&xRedis);
char szKey[256] = {0};
sprintf(szKey, key);
return xRed.exists(d, szKey);
}
//Save
bool xRedisAdmin::save(const char * key, const char * val)
{
RedisDBIdx d(&xRed);
char szKey[256] = {0};
sprintf(szKey, key);
bool ret_val = xRed.set(d, szKey, val);
//Log output
return ret_val;
}
Main.cpp
xRedisAdmin *xRed;
void example_callback() {
bool bRet = xRed->save("key", "c_str");
}
int main()
{
xRedisAdmin x (RedisList1, conn_list_size);
xRed = &x;
example_callback();
return 0;
}

Answer 1

As it turns out, this is what I get for violating the Rule of Threes.
I did not have a copy constructor for the Redis Admin, and the xRed object inside it became null on assignment because of this. Use of new & delete, rather than creating in the main method, did resolve the issue. proved the solution to the issue
Thanks all who commented and gave me answers & support!
Alex