[Issue 15586] std.utf.toUTF8() segfaults when fed an invalid dchar

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=15586

--- Comment #3 from thomas.bockman at gmail.com ---
> This doesn't seem like a Phobos bug; it seems to be a bug in the compiler for "optimizing" away the assert just because it thinks that dchar's cannot have invalid values.

That's the compiler bug I linked to in the OP (15585).

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