DMD CTFE Bug?

[David]

I have this code: http://dpaste.dzfl.pl/dbe2a07f

It works perfectly fine, except for `t!(2, 10)` and `t!(1, 10)`:

// Expected:
[Vertex(-0.5, 0.5, 0.5, 0, 1, 0, 2, 10, 2, 10, 0, 0), Vertex(0.5, 0.5, 
0.5, 0, 1, 0, 3, 10, 3, 10, 0, 0), Vertex(0.5,  0.5, -0.5, 0,  1, 0, 3, 
9, 3, 9, 0, 0),
  Vertex(-0.5, 0.5, 0.5, 0, 1, 0, 2, 10, 2, 10, 0, 0), Vertex(0.5, 0.5, 
-0.5, 0, 1, 0, 3, 9, 3, 9, 0, 0), Vertex(-0.5, 0.5, -0.5, 0, 1, 0, 2, 9, 
2, 9, 0, 0)]

// Actual result:
[Vertex(-0.5, 0.5, 0.5, 0, 1, 0, 2, 10, 2, 10, 0, 0), Vertex(0.5, 0.5, 
0.5, 0, 1, 0, 3, 10, 3, 10, 0, 0), Vertex(0.5, -0.5,  0.5, 0, -1, 0, 6, 
3, 6, 3, 0, 0),
  Vertex(-0.5, 0.5, 0.5, 0, 1, 0, 2, 10, 2, 10, 0, 0), Vertex(0.5, 0.5, 
-0.5, 0, 1, 0, 3, 9, 3, 9, 0, 0), Vertex(-0.5, 0.5, -0.5, 0, 1, 0, 2, 9, 
2, 9, 0, 0)]

If I change `enum` in line 117 to `auto` it produces the expected result.

Any ideas why this happens?

(Btw. I wasn't able produce a smaller testcase)