顺序队列的初始化问题

#include<stdio.h>
#include<stdlib.h>

#define TRUE 1
#define FALSE 0
#define MAXSIZE 10

typedef int ElemType;

typedef struct SqQueue{
    ElemType *base;
    int front;
    int rear;
}*SqQueue;

SqQueue initQueue(){
    SqQueue q;
    q->base = (ElemType*)malloc(sizeof(ElemType)*MAXSIZE);
    q->front = q->rear = 0;
    return q;
}

int queueFull(SqQueue q){
    if(q == NULL){
        return FALSE;
    }
    // 判断队尾下标是否超过最大容量
    if(q->rear >= MAXSIZE){
        return TRUE;
    }
    return FALSE;
}

int queueEmpty(SqQueue q){
    if(q == NULL){
        return FALSE;
    }
    return q->front == q->rear;
}

int getLength(SqQueue q){
    if(q == NULL){
        return FALSE;
    }
    return q->rear - q->front;
}

int enQueue(SqQueue q,ElemType data){
    q->base[q->rear] = data;
    q->rear++;
    return TRUE;    
}

int deQueue(SqQueue q,ElemType *data){
    *data = q->base[q->front];
    q->front++;
    return TRUE;
}

int main(){
    SqQueue q;
    q = initQueue();
    int data;

    printf("enQueue: ");
    for(int i = 1;i < MAXSIZE*2;i+=2){
        printf("%d  ",i);
        enQueue(q,i);
    }
    printf("\n");

    // 获取长度
    printf("Queue's length: %d\n",getLength(q));

    printf("deQueue: ");
    deQueue(q,&data);
    printf("%d\n",data);

    // 获取长度
    printf("Queue's length: %d\n",getLength(q));
}

我这个顺序队列的代码好像没有问题啊，debug的时候却提示这个问题！

初学者求解，感谢！

q指针没有分配内存

SqQueue initQueue(){
    SqQueue q = (SqQueue)malloc(sizeof(struct SqQueue));
    q->base = (ElemType*)malloc(sizeof(ElemType)*MAXSIZE);
    q->front = q->rear = 0;
    return q;
}