Comment 5 for bug 1929105

Fixed for 2.33 via:

commit 7d88c6142c6efc160c0ee5e4f85cde382c072888
Author: Florian Weimer <email address hidden>
Date: Wed Jan 27 13:36:12 2021 +0100

    gconv: Fix assertion failure in ISO-2022-JP-3 module (bug 27256)

    The conversion loop to the internal encoding does not follow
    the interface contract that __GCONV_FULL_OUTPUT is only returned
    after the internal wchar_t buffer has been filled completely. This
    is enforced by the first of the two asserts in iconv/skeleton.c:

                  /* We must run out of output buffer space in this
                     rerun. */
                  assert (outbuf == outerr);
                  assert (nstatus == __GCONV_FULL_OUTPUT);

    This commit solves this issue by queuing a second wide character
    which cannot be written immediately in the state variable, like
    other converters already do (e.g., BIG5-HKSCS or TSCII).

    Reported-by: Tavis Ormandy <email address hidden>