5147 – [CTFE] Return fixed-sized matrix

This is borderline between enhancement and rejects-valid bug report.
DMD 2.050 doesn't support this code:
int[1][1] foo() {
 int[1][1] a;
 return a;
}
enum int[1][1] m1 = foo();
immutable int[1][1] m2 = foo();
void main() {}
Errors generated:
test.d(2): Error: Slice operation a[] = 0 cannot be evaluated at compile time
test.d(5): Error: cannot evaluate foo() at compile time
This code is very useful to initialize an enum/immutable global matrix.

I would like to point out that this code works:
int[1] foo2() {
 int[1] a;
 return a;
}
enum int[1] m3 = foo2();
immutable int[1] m4 = foo2();
void main() {}

See also bug 5081 for a different solution

This is definitely a bug, not an enhancement. It applies to any use of multidimensional static arrays in CTFE (not just return values). Thus, it also applies to D1.
Fixed.
D1:
https://github.com/D-Programming-Language/dmd/commit/ef2a0f1da10331c4de102ca3e029ea1c1c1a46bf
D2:
https://github.com/D-Programming-Language/dmd/commit/0219a5f0dcc88076759a4c472582954d0fb804b0