[Issue 5995] string append negative integer causes segfault

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=5995

--- Comment #15 from Steven Schveighoffer <schveiguy at yahoo.com> ---
Lucia, I think nothing should implicitly cast to dchar. Not bool, int, or even
char or wchar. But something this drastic needs approval from Walter and
Andrei.

Of course, we definitely need a deprecation step before completely banning it
-- this will certainly break a lot of code.

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