[Issue 2902] improve error message with template

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=2902





------- Comment #2 from someanon at yahoo.com  2009-04-26 13:03 -------
(In reply to comment #1)
> Now try telling the rest of us what you're trying to compile when these
> messages appear.
> 

I don't know! The compiler should tell me where is caller is!

That's exactly why I'm logging this bug.

When I upgrade the compiler it suddenly have this error, it's hard to dig into
thousands of lines of my code to find out which writefln is causing the
problem.


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