[Issue 18318] std.net.curl.download silently ignores non-2xx http statuses

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=18318

--- Comment #4 from Martin Nowak <code at dawg.eu> ---
(In reply to Aravinda from comment #2)
>     auto conn = HTTP(url);
>     download(url, "tmp", conn);
>     auto status = conn.statusLine();
>     if (status.code == 200){

Thanks, that's a helpful workaround for the time being.
But by default, high-level functions should throw on errors, so that they
aren't accidentally ignored.

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