[Issue 12417] `toStringz` is fundamentally broken

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=12417

--- Comment #4 from Denis Shelomovskij <verylonglogin.reg at gmail.com> ---
(In reply to John Colvin from comment #3)
> You mean something like this?

Yes, this is an example of what may go wrong. But in a general case we don't
even know what calling convention (e.i. ABI) so the reference can be easily
lost.

Also now most `toStringz`/`toUTF16z`/`toUTFz` usages in Phobos are replaced
with `tempCString*` ones [1] so this doesn't affect much Phobos itself.

The problem is `toStringz` and friends aren't properly documented as dangerous
(and also inefficient by the way) and `tempCString*` replacement isn't public
(addition of new public features to Phobos looks too complicated for me).

[1] https://github.com/D-Programming-Language/phobos/pull/2332

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