7681 – Regression(2.059head):ICE:opCatAssign(delegate) to undefined identifier

When building the following code, dmd crushes after compile-error message.
DMD 2.058 does not crush.
 void main() {
 undefined ~= delegate(){};
 }
This syntax is frequently used by DFL applications. Such as:
 auto object = new SomeObject(); // defined, of course :)
 object.click ~= (sender, args){ doSomething(); };
Environment:
Windows XP SP3 32bit
DMD 2.059head

https://github.com/D-Programming-Language/dmd/pull/805 

Commit pushed to master at https://github.com/D-Programming-Language/dmd
https://github.com/D-Programming-Language/dmd/commit/bd5f360c3aeb3e7948bc1d707ab4e90542f55cbf
Merge pull request #805 from donc/regression7681
Fix issue 7681 Regression(2.059head):ICE:opCatAssign(delegate) to undefi...

Commit pushed to dmd-1.x at https://github.com/D-Programming-Language/dmd
https://github.com/D-Programming-Language/dmd/commit/136c1072a7621e89d02df2ed4145323856ae930b
merge D2 pull #805 fix Issue 7681