1176 – Error missing file and line number

"Error: cannot implicitly convert expression (_param_0) of type luigi.gui.Widget to luigi.gui.Button"
The above error appeared because of a line of code like this:
 b31b.clicked ~= (Button b){
 onApplyTexture();
 };
All error messages should print file an line numbers, preferably in the form:
 <filename>(<linenumber>): Error: <the message>
This makes it easier for IDEs and text editors to automatically take the user to the line that generated the error.

test case:
http://dstress.kuehne.cn/nocompile/v/void_02_D.d 

Fixed DMD1.032

Fixed dmd 1.032 and 2.016