DMD 1.025 and 2.009 releases

["のしいか (noshiika)"]

Walter Bright wrote:
> New const/invariant/enum in 2.009!
> 
> http://www.digitalmars.com/d/1.0/changelog.html
> http://ftp.digitalmars.com/dmd.1.025.zip
> 
> http://www.digitalmars.com/d/changelog.html
> http://ftp.digitalmars.com/dmd.2.009.zip

Happy new year, Walter!

This update caused a massive breakage to my program and I don't have any 
idea how to observe the new const/invariant rules.

Codes using const class or struct are broken:
--------------------------------------------

import std.conv, std.stdio;

class C {
     private int i;
     this(int i) { this.i = i; }
     const string toString() { return to!(string)(this.i); }
}

void main() {
     const(C) c;
     c = new C(1); // error
     writeln(c);
}

--------------------------------------------

Please help me upgrade to 2.009!
Thank you.