java malloc,尝试：为什么malloc错误来了

运行我的尝试程序时，我一直收到错误 .

a.out：malloc.c：2372：sysmalloc：断言`(old_top ==(((mbinptr)(((char *)＆((av) - > bins [((1) - 1)* 2]) ) - builtin_offsetof(struct malloc_chunk，fd))))&& old_size == 0)|| ((unsigned long)(old_size)> =(unsigned long)((( builtin_offsetof(struct malloc_chunk，fd_nextsize))((2 *(sizeof(size_t))) - 1))~~((2 *(sizeof( size_t))) - 1)))&&((old_top) - > size＆0x1)&&((unsigned long)old_end＆pagemask)== 0)'失败 .

我的代码是：

#include

#include

#include

typedef struct nodeData

{

char ch; /* This structure looks like a linked list */

struct nodeData *next;

}node;

typedef struct tries

{

node *start[26];

}tries;

tries *makeAllNull(tries *root)

{

int i=0;

for(i=0;i<=26;i++)

{

root->start[i] = NULL;

}

return root;

}

/* Insert the given string in to the tries */

tries *insert(tries *root,char *str,int len)

{

int i=0;

tries *temp;

temp = (tries *)malloc(sizeof(tries));

while(i

{

int k = str[i] - 'a';

temp->start[k] = (node *)malloc(sizeof(struct nodeData));

temp->start[k]->ch = str[i];

temp->start[k]->next = NULL;

if(temp->start[k] == NULL)

{

root->start[k] = temp->start[k];

}

else{

root->start[k]->next = temp->start[k];

}

i++;

}

return root;

}

int main()

{

int i=0;

tries *root;

root = (tries *)malloc(sizeof(node *));

makeAllNull(root);

char str[30];

while(i<5)

{

scanf("%s",str);

root = insert(root,str,strlen(str));

}

return 0;

}