assertion "item->token_type == TT_Dict" failed in parse_fonts

Seen in 20221020/3a43ec6ad68a20628ced8feca84e179c4487286773b6168485d713a120125b91 of the instigator corpus.

Backtrace:

#0  thrkill () at /tmp/-:3
#1  0xbcb8cbd77ac20399 in ?? ()
#2  0x000006e46efe52ae in _libc_abort () at /usr/src/lib/libc/stdlib/abort.c:51
#3  0x000006e46efff712 in _libc___assert2 (file=Variable "file" is not available.
)
    at /usr/src/lib/libc/gen/assert.c:52
#4  0x000006e26df801e5 in parse_fonts (dict_t=0x6e4bda075b8, 
    pgRsrc=0x6e52e9b7158, aux=0x7f7fffff4f98) at pdf.c:3725
#5  0x000006e26df80bb5 in parse_rsrcdict (arena=0x6e4f1d16e80, 
    dict_t=0x6e4bda075b8, pgNode=0x6e499728018, aux=0x7f7fffff4f98)
    at pdf.c:3885
#6  0x000006e26df814f4 in parse_pagenode (aux=0x7f7fffff4f98, 
    myNode=0x6e499728018, myRef=0x6e4b93c19c8, myDict=0x6e49988e448, 
    parent_t=0x6e497743d68, parent_n=0x7f7fffff4ff0, arena=0x6e4f1d237c0)
    at pdf.c:4028
#7  0x000006e26df822b8 in parse_pagetree (aux=0x7f7fffff4f98, 
    myNode=0x7f7fffff4ff0, myRef=0x6e497743d68, myDict=0x6e4e9538538, 
    parent_t=0x0, parent_n=0x0) at pdf.c:4255
#8  0x000006e26df8255d in parse_catalog (aux=0x7f7fffff4f98, 
    root=0x6e54b58c880) at pdf.c:4326
#9  0x000006e26df83c1f in parse_xrefs (aux=0x7f7fffff4f98) at pdf.c:4947
#10 0x000006e26df84531 in main (argc=1, argv=0x7f7fffff5170) at pdf.c:5128

Context:

#4  0x000006e26df801e5 in parse_fonts (dict_t=0x6e4bda075b8, 
    pgRsrc=0x6e52e9b7158, aux=0x7f7fffff4f98) at pdf.c:3725
3725                    assert(item->token_type == TT_Dict);
Current language:  auto; currently minimal
(gdb) list
3720    
3721            // Handle a dictionary of font resources
3722            item = dictentry(fontdict, "Font");
3723            item = resolve(aux, item);
3724            if (item) { // TODO: Failure ==> xref error -- Figure out how to handle
3725                    assert(item->token_type == TT_Dict);
3726                    processed = true;
3727                    Dict *fontlist = H_CAST(Dict, item);
3728                    if (pgRsrc->fonts) {
3729                            log_message(SEV_DONTCARE, "\n\nparse_fonts: Attempt to add fonts -- Supported??\n\n");
(gdb) print item
$1 = (const HParsedToken *) 0x6e54f237e10
(gdb) print item->token_type
$2 = TT_SEQUENCE