I was using the AE[1] library, but recently it started to fail to compile due to essentially this:

--------
import std.datetime;

void main()
{
    Duration dur;
    auto x = new SimpleTimeZone(dur);
}
--------

> test.d(8): Error: immutable method std.datetime.SimpleTimeZone.this is not callable using a mutable object
> test.d(8): Error: no constructor for SimpleTimeZone

The only constructors available for that class are all immutable.

Why the breaking change? Did it break on purpose? And why is the error message so awful?

On Thursday, 16 May 2013 at 14:01:13 UTC, Andrej Mitrovic wrote:
> I was using the AE[1] library, but recently it started to fail to
> compile due to essentially this:
>
> --------
> import std.datetime;
>
> void main()
> {
>     Duration dur;
>     auto x = new SimpleTimeZone(dur);
> }
> --------
>
>> test.d(8): Error: immutable method std.datetime.SimpleTimeZone.this is not callable using a mutable object
>> test.d(8): Error: no constructor for SimpleTimeZone
>
> The only constructors available for that class are all immutable.
>
> Why the breaking change? Did it break on purpose? And why is the error
> message so awful?

I believe it may be related to this:
http://forum.dlang.org/post/517E4196.9090002@outerproduct.org

http://forum.dlang.org/post/CAFDvkctF-_A=JpP7a+qO43vsQLBg_UPnUsJjj01vKaEQWbJ4RA@mail.gmail.com

On 5/16/13, nazriel <spam@dzfl.pl> wrote:
> I believe it may be related to this: http://forum.dlang.org/post/517E4196.9090002@outerproduct.org
>
> http://forum.dlang.org/post/CAFDvkctF-_A=JpP7a+qO43vsQLBg_UPnUsJjj01vKaEQWbJ4RA@mail.gmail.com

Thanks, that does explain it. I have to put this in the changelog ASAP.

Chances are the 2.063 release is going to be one of the most breaking releases ever.