[Issue 17102] std.write.file generates a segmentation fault when the file name is a string with a default value

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=17102

--- Comment #1 from anonymous4 <dfj1esp02 at sneakemail.com> ---
It depends on what you want. If we treat the default string value as null, it
gets passed as null to C API, and the crash is expected.

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