Why does nobody seem to think that `null` is a serious problem in D?

[Chris Katko]

> Try to learn D.
> Put writeln in deconstructor to prove it works as expected
> Make random changes, program never runs again.
> Takes 30+ minutes to realize that writeln("my string") is fine, 
> but writeln("my string " ~ value) is an allocation / garbage 
> collection which crashes the program without a stack.

My favorite D'ism so far: