Decode to =?GB18030?B?lDnaMw==?=: failed

[lygstate]

The following GB18030 decode incorrect.
=?GB18030?B?lDnaMw==?=:

[inexorabletash]

Can you provide the error as a code sample? I'm not sure how you intend that string to be interpreted. (As a sequence of ASCII bytes? etc)

[inexorabletash]

No feedback, closing.

[Artoria2e5]

This is an RFC 2047 "encoded-word", written in the "B" (base64) encoding. So it's basically:

new TextDecoder('gb18030').decode(
    Uint8Array.from(
        atob('lDnaMw=='), 
        (ch) => (ch.codePointAt(0))))
// "💩"

[inexorabletash]

Thanks for providing the repro!