allMembers broke for __

[DigitalDesigns via Digitalmars-d]

When an identifier starts with __, allMembers does not return it. 
This is very bad behavior! It can silently create huge problems 
if the programmer is not aware of the bug.

Instead, if you want to keep the current behavior at least create 
an error or warning rather than silently create a bug to waste 
the users time tracking it down.