[dmd-internals] Error messages with no line number

[Trass3r]

Yeah the error handling is a mess.
There are several different versions of error() in different places  
(mars.c, root.c, expression.c, ...). Some add loc by themselves, some  
don't (like the global one you mentioned).
I think that's why it's so error prone.

In todt.c:141 an error function is called but neither Visual Studio's  
IntelliSense nor VisualAssist's usually very smart one can detect which  
one is called.


Additionally in the following issue Expression::error() is called in  
todt.c:683 which normally does add loc to the message, but for some reason  
loc is null:
http://d.puremagic.com/issues/show_bug.cgi?id=4241


Warnings are another problem. For example see this bug where a warning is  
put out like an error:
http://d.puremagic.com/issues/show_bug.cgi?id=4216