dmd test coverage

[Daniel Murphy via Digitalmars-d]

"Walter Bright"  wrote in message news:m5b044$1bh2$1 at digitalmars.com...

> And quickfur (H.S. Teoh) once again proves how important having coverage 
> testing is! In trying to increase coverage a lurking bug was uncovered and 
> quickly fixed:
>
> https://github.com/D-Programming-Language/dmd/pull/4171

Not that fixing it wasn't useful, but that was a minor diagnostic bug that 
only happens when misusing a feature that nobody uses.