Use debug dcus option in Delphi 2009 ?

Question

Hi,

On setting "Use debug .dcus" option to True in project options, method calls in my application does not work as expected.

Say for example,

I call a method func(a, b, c);

In the "func" definition c's value is assigned to "a" and a's values is assigned to "c" and everything goes crazy.

I tried to create it in sample application, but with no luck. It is happening only in my live project.

Any one faced the same issue?

From delphi docs I see that Debug dcus option builds information using stack frames. Anything related to this?

Pavan.

Answer 1

This is sort of an obvious one, but did you make sure to do a full rebuild and not just a normal compile? Anytime you change project settings, you have to do a full rebuild or you'll end up with undefined behavior. (That's the technical term for "everything goes crazy.")

Answer 2

If you can't create a sample application, then it obviously must be something in your live project that is not what you might expect.

I can only suggest you tackle the problem by making a copy of your live project, and then systematically remove one thing at a time. The step that makes the problem go away will help you narrow down where the problem is.

Answer 3

Are you doing anything with generics or anonymous methods? Even with Update 3 installed, the Delphi 2009 compiler still has several subtle bugs in it--mostly related to the new features--that can be very difficult to reduce down to a simple test case.