>>>>> On Thu, 19 Dec 2019 17:11:24 +0200, Eli Zaretskii <eliz@gnu.org> said:
    Eli> We need to truncate the names we store in the thread object (and
    Eli> document that).

    Eli> I think I'm going to change my mind on that.  The complication here is
    Eli> that the name should be encoded by ENCODE_SYSTEM before we pass it to
    Eli> pthread_setname_np etc., and if the locale-coding-system is not UTF-8
    Eli> and not single-byte, we don't really know where a character will end
    Eli> after encoding.  And encoding one character at a time sounds too
    Eli> gross.

    Eli> So perhaps we should just truncate the bytes, and leave this to the
    Eli> application to make sure the result makes sense, and also disregard
    Eli> the difference between list-threads and the thread name as the OS and
    Eli> debuggers see it.  Doing that will also avoid the complication of
    Eli> having the thread name return to the caller different from what the
    Eli> caller used.

Hereʼs what it looks like.