[Issue 21250] dirEntries on non-existant directory causes assert error

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21250

--- Comment #2 from Stefan Koch <uplink.coder at gmail.com> ---
Related: https://issues.dlang.org/show_bug.cgi?id=21036

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