Safe method wont check dangling pointer?

[Walter Bright via Digitalmars-d]

On 4/14/2014 8:14 PM, lzzll wrote:
> I understand implemented this is hard and it need huge cost.
> It still be useful if we only use it to detect memory error and trun it off when
> release.
> I'll be glad if I can see it on D after some years.

Valgrind is an incredibly useful tool, but programs run terribly slowly under it.