Why does a program accessing illegal pointer to pointer not crash?

A program accessing illegal pointer to pointer does not crash with SIGSEGV. This is not a good thing, but I’m wondering how this could be and how the process survived for many days in production. It is bewildering to me.

I have given this program a go in Windows, Linux, OpenVMS, and Mac OS and they have never complained.

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

void printx(void *rec) { // I know this should have been a **
    char str[1000];
    memcpy(str, rec, 1000);
    printf("%*.s\n", 1000, str);
    printf("Whoa..!! I have not crashed yet :-P");
}

int main(int argc, char **argv) {
    void *x = 0; // you could also say void *x = (void *)10;
    printx(&x);
}