gcc/testsuite/gcc.dg/analyzer/CVE-2005-1689-minimal.c

#include <stdlib.h>

typedef struct _krb5_data {
  char *data;
} krb5_data;

void
test_1 (krb5_data inbuf, int flag)
{
  free(inbuf.data); /* { dg-message "first 'free' here" } */
  free(inbuf.data); /* { dg-warning "double-'free' of 'inbuf.data'" } */
}

void
test_2 (krb5_data inbuf, int flag)
{
  if (flag) {
    free(inbuf.data); /* { dg-message "first 'free' here" } */
  }
  free(inbuf.data); /* { dg-warning "double-'free' of 'inbuf.data'" } */
}

void
test_3 (krb5_data inbuf, int flag)
{
  if (flag) {
    free((char *)inbuf.data); /* { dg-message "first 'free' here" } */
  }
  free((char *)inbuf.data); /* { dg-warning "double-'free' of 'inbuf.data'" } */
}