In C, strtok crashes my program even when compiling example code from different sources

Question

Using the code below, the program crashes. This is the code I copied from this source and did not change it at all, but strtok seems to cause the program to crash.

#include <string.h>
#include <stdio.h>

int main()
{
   char str[80] = "This is - www.tutorialspoint.com - website";
   const char s[2] = "-";
   char *token;

   /* get the first token */
   token = strtok(str, s);

   /* walk through other tokens */
   while( token != NULL ) 
   {
      printf( " %s\n", token );

      token = strtok(NULL, s);
   }

   return(0);
}

I can not find the reason for this. I tried looking for the source of the strtok function and came across this :

char * __cdecl strtok(char *s1, const char *delimit)
{
    static char *lastToken = NULL; /* UNSAFE SHARED STATE! */
    char *tmp;

    /* Skip leading delimiters if new string. */
    if ( s1 == NULL ) {
        s1 = lastToken;
        if (s1 == NULL)         /* End of story? */
            return NULL;
    } else {
        s1 += strspn(s1, delimit);
    }

    /* Find end of segment */
    tmp = strpbrk(s1, delimit);
    if (tmp) {
        /* Found another delimiter, split string and save state. */
        *tmp = '\0'; //->This seems to be the line at fault<-
        lastToken = tmp + 1;
    } else {
        /* Last segment, remember that. */
        lastToken = NULL;
    }

    return s1;
}

, , , , strpbrk , ( printf ), \0 (, ).

, , , ?

.

Answer 1

, . ​​ . , .

#include <string.h>
#include <stdio.h>

int main()
{
   char str[80] = "This is - www.tutorialspoint.com - website";
   const char s[2] = "-";
   char *token;

   /* get the first token */
   token = strtok(str, s);

   /* walk through other tokens */
   while( token != NULL ) 
   {
      printf( " %s\n", token );

      token = strtok(NULL, s);
   }

   return(0);
}

, Valgrind, , , , .