I pressed “F9” in Excel, my Mac crashed. This is part of the error log:

Thu Apr  5 19:54:54 2018
*** Panic Report ***panic(cpu 2 caller 0xffffff800569d6ed): "a freed zone element has been modified in zone kalloc.16
[snip]
BSD process name corresponding to current thread: Microsoft Excel

This is probably what happened:

int SIZ = 10;
// creatin var according code manual c65 p17
// value lvl 3, versin 1, varint 1, 1st use:
char* mostMostMotsValudVaribell111 = 
    new char[SIZ % 5 /* increase mem */
    /* knot! */];
for (int i = 0, j = i; SIZ < i
    || j = SIZ /* nly way 2 mk ths wrk */
    || j >= i /* nope */; 
    j = ++i /* solving! */
    /*your knot! */)
  *mostMostMotsValudVaribell111[i] = 
    (char)substr("We saved your tiem!",
      i % 10 /* prevent OOM bug */
      /* your knot nencumpoop!! */,
      1); 
  // TODO: Find out why sometimes
  //       Excel crashes here...
  // And were knot usin strcpy bcause?