modernc.org/ccgo/v3@v3.16.14/lib/testdata/gcc-9.1.0/gcc/testsuite/gcc.c-torture/execute/951204-1.c (about)

     1  f (char *x)
     2  {
     3    *x = 'x';
     4  }
     5  
     6  main ()
     7  {
     8    int i;
     9    char x = '\0';
    10  
    11    for (i = 0; i < 100; ++i)
    12      {
    13        f (&x);
    14        if (*(const char *) &x != 'x')
    15  	abort ();
    16      }
    17    exit (0);
    18  }