DMD diagnostic - any way to remove identical lines from final dmd error log?

[Walter Bright via Digitalmars-d]

On 8/13/2012 9:47 AM, Dmitry Olshansky wrote:
> I seriously consider writing a simple postprocessor for dmd's output.
> Once dmd became able to recover from errors and crawl on it started to produce
> horrific amounts of redundant text on failure.

The current strategy the compiler uses on detecting a bug is it marks whatever 
symbol/expression/statement caused the bug as "poisoned". Then, every dependency 
on that poisoned symbol/expression/statement is also marked as "poisoned" and 
error messages for them are suppressed.

This has been extremely successful at reducing cascaded, duplicated, and 
nonsense error messages.

However, it is not completely implemented throughout the compiler.