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

[via Digitalmars-d-bugs]

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

hsteoh at quickfur.ath.cx changed:

           What    |Removed                     |Added
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                 CC|                            |hsteoh at quickfur.ath.cx

--- Comment #2 from hsteoh at quickfur.ath.cx ---
I don't understand something here.  The in-contract of toUTF8 asserts that the
dchar must be valid... but why does the assert not trigger at runtime (even in
spite of not compiling with -release).  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.

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