This fails depending on T:
----
alias T = long;
void main()
{
T[2] a1 = [1, 2];
T[2][1] a2;
a2[] = a1; /* line 6 */
assert(a2[0] == a1); /* line 7 */
}
----
If T is long or double, it segfaults on line 6.
If T is ulong, the assert on line 7 fails.
It works with (u)byte, (u)short, (u)int, float, and real.
The problem seems to be with 8 byte wide types.
Tested with git head, 2.067, and 2.068.