[Issue 18580] std.conv.to!(ubyte[])(void[]) should work

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=18580

ag0aep6g at gmail.com changed:

           What    |Removed                     |Added
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                 CC|                            |ag0aep6g at gmail.com

--- Comment #4 from ag0aep6g at gmail.com ---
(In reply to Jack Stouffer from comment #3)
> Is it unsafe though? In this specific case of void[] to ubyte[] (or vise
> versa) isn't it ok?

void[] to ubyte[] is unsafe, because anything converts to void[]:

----
void f(int*[] p)
{
    void[] v = p; /* This is considered @safe. Don't even need a cast. */
    ubyte[] b = cast(ubyte[]) v; /* Just as unsafe as `cast(ubyte[]) p`. */
    b[0] = 123; /* Messing with pointers like this is not safe. */
}
----

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