WTF: dmd 2.066 vs. dmd 2.067 really dangerous code breakage

[Daniel Kozak via Digitalmars-d]

On Wednesday, 22 April 2015 at 11:28:44 UTC, Daniel Kozak wrote:
static struct S
{
      immutable FLAG_ON = 1;
      immutable FLAG_GPRS = 2;
      immutable FLAG_HIDDEN = 4;
      ubyte flags;
      ubyte value;

      bool isFlagSet(int flag)
      {
          return flags && flag == flag;
      }
}

void main(string[ ] args)
{
      auto someData = [0x01, 0x10, 0x02, 0x16, 0x04, 0x08];
      auto countS = someData.length / S.sizeof;

      S[] sArray = (cast(S*)someData.ptr)[0 .. countS];
      assert(sArray.length == 3);
}