[Issue 20109] DirEntries() fails on symbolic links to non-existent file

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=20109

shove <shove at 163.com> changed:

           What    |Removed                     |Added
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                 CC|                            |shove at 163.com

--- Comment #1 from shove <shove at 163.com> ---
I don't think there is any problem here. It is correct to throw an exception to
a non-existent file getSize.

When traversing files, folders and symlinks, we should judge them and decide
whether to do some operations.


    import std.file;
    import std.stdio;

    string path = "...";
    foreach (DirEntry e; dirEntries(path, SpanMode.shallow))
    {
        if (e.isSymlink)
        {
            string origin = readLink(e.name);
            if (origin.exists)
                writeln(origin, ", size: ", e.size);
            else
                writeln(origin, " not exists. ");
        }
    }

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