ELF object files: executable stack and security risk?

[Kagamin]

Walter Bright Wrote:

> I should clarify that. If you write C style code in D, yes, your code is not 
> verifiably safe and hence your programs could be susceptible to malicious 
> attacks based on buffer overflow exploits.
> 
> But, if you write in D style, using arrays, ranges, and other safe data 
> structures, the risk of your program being vulnerable to such exploits is 
> reduced enormously.

Do you consider code working with arrays and compiled in release mode safe?