modernc.org/ccgo/v3@v3.16.14/lib/testdata/gcc-9.1.0/gcc/testsuite/gcc.c-torture/execute/920428-1.c (about)

     1  x(const char*s){char a[1];const char*ss=s;a[*s++]|=1;return(int)ss+1==(int)s;}
     2  main(){if(x("")!=1)abort();exit(0);}