regarding pointers and malloc errors

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

/i am writing a code for a compiler for toy language.this is a snipet of code . in main there are two functions createlist and node .when one is commented other one works fine but together it shows a error which i dont understand.any help is appreciated/

struct node {          //declaration for node
int tokenno;
struct node * next ;
};

struct node * newnode(int a)          // to create a new node
{
struct node * new1  = (struct node *)malloc(sizeof(struct node));
printf("\n malloc sucees");

(*new1).tokenno = a ;
(*new1).next = NULL ;
printf("\new node sucess\n");
return (new1);
};

struct firstlist{
int size ;
struct node * list[10];
};
typedef struct firstlist * plist; 

plist createlist(){                 //fun to create a first list
int i ;                              

plist p  = (plist) malloc(sizeof(struct firstlist));
(*p).size = 10 ;
for(i = 0 ; i <=10;i++){           //initializing list[i] to NULL
    (*p).list[i] = NULL ;
}
printf("\n created sucessfully");
return p;

}





int main(){                         
plist p ;
//p = createlist();   // if you comment createlist the new node works       fine
//getfirstset(p);
//insert(1,5,p);          
newnode(2); // if you comment newnode then createlist works fine but    together it shows the following error

                        /*a.out: malloc.c:2372: sysmalloc: Assertion `(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)' failed.
                        created sucessfullyAborted*/

}

asked 1 min ago

user3452283

1

regarding pointers and malloc errors