[Issue 14519] [Enh] foreach on strings should return replacementDchar rather than throwing

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=14519

--- Comment #24 from Martin Nowak <code at dawg.eu> ---
If we validate encoding on data entry points such as readText or byLine, then
decoding errors should be assertions rather than silent replacements, because
it's a programming error to use unvalidated data as string.

--