flexible array members in C

flexi.c

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

typedef struct {
  char len;
  char cap;
  char data[];
} MySeq;

void dump (MySeq *seq) {
	printf("seq.data: %s\n", seq->data);
}

int main (void) {
	char *s = "\06\00hello";
	dump((MySeq*) s);
}