The following code bypasses immutabililty with GDC but not DMD

[Iain Buclaw]

On Friday, 12 April 2013 at 00:50:03 UTC, Nicholas Smith wrote:
> I don't know how to file bug reports but I'm sure this 
> shouldn't happen :)
> DMD gives an error.
>

That's a bug in the frontend, which has since been fixed and 
merged into gdc.

Just how old is your compiler? :)