[Issue 18339] Variant.coerce is unable to convert between types that std.conv.to is able to convert

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=18339

hsteoh at quickfur.ath.cx changed:

           What    |Removed                     |Added
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           See Also|                            |https://issues.dlang.org/sh
                   |                            |ow_bug.cgi?id=12997

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