Filed as Bug

[Peter Alexander]

On Tuesday, 8 April 2014 at 21:13:47 UTC, Jeroen Bollen wrote:
> Here we go: https://d.puremagic.com/issues/show_bug.cgi?id=12549

Not a bug:

What you are asking for is to allow immutable(T)** and int** to 
convert to const(T)**

int a = 0;
int* pa = &a;
const(int)** ppa = &pa; // not currently allowed

immutable(int) b = 1;

*ppa = &b; // equivalent to pa = &b!!! i.e. pa (mutable) now 
points at b (immutable)!!!