Feature Request: Location of template instantiation failure

[BCS]

BCS wrote:

> 
> how about a template stack trace?
> 
> test.d(5): static assert  is false
> test.d(12): f instantiation failure
> bob.d(21): foo instantiation failure
> .
> .
> .
> 
> 

now that I have looked at Oskar's post: trim out all but the some amount 
of the head and tail of the above (and add the args into the listing)