C: free(): invalid next size (fast) -

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• facing error “*** glibc detected *** free(): invalid next size (fast)” 2 answers

hello i've spent last couple hours looking through code attemting find causing memory error. ive been told repeatedly situation of freeing never malloced or freeing twice, have gone through , shrunk code down make sure neither of these possible. whole project linked list, ive taken out of components of project make smallest possible replication of error. thanks! code:

#include <stdlib.h> #include <stdio.h> #include <string.h> #include "list.h"  struct lnode{   int count;   int line;   struct lnode *next;   char *word; };   struct lnode* newnode (char* word, int line) {   struct lnode *mynode = malloc(sizeof(struct  lnode*));    mynode->word = (char*)malloc((strlen(word))*sizeof(char));   strcpy(mynode->word,word);   mynode->count = 1;   mynode->line = line;   mynode->next = null;   return mynode; } void freenode(struct lnode * mynode){   //free(mynode->word);   //mynode->word = null;   free(mynode);   mynode = null; } int main(){   struct lnode *n = newnode("test", 2);   free(n);   return 0; } 

gives error:

*** glibc detected *** ./listtest: free(): invalid next size (fast): 0x085d008 *** 

change

  struct lnode *mynode = malloc(sizeof(struct  lnode*)); 

to

  struct lnode *mynode = malloc(sizeof(struct  lnode)); 

and

  mynode->word = (char*)malloc((strlen(word))*sizeof(char)); 

to

  mynode->word = (char*)malloc((strlen(word)+1)*sizeof(char)); 

thank going through effort make smallest test case could.