A real 1.12 global we did not have (`reference/1.12-globals.tsv`), and the
natural way for an addon to ask the live UI which frames carry some script
or property — the player's backlog item, raised because nothing answered.
Read off `0x705f60`. The frame manager owns a Storm list (`[0xcf0bd8]+0xcc0`,
link offset `0x304` written by its ctor at `0x7641b8`) and the `CSimpleFrame`
ctor links every new frame through `0x7646a0`, which puts the newcomer in the
sentinel's own slot `[0xcc4]` and the frame it displaced in the newcomer's
`+0x308`. So the list is walked **newest to oldest**: with no frame the
binding answers `[0xcc4]`, with one `[frame+0x308]`, and the first frame ever
created holds the tagged sentinel `&head|1` there, which is the `test $0x1,%al`
that ends the walk with nil.
Three details that are not guesses:
- The only type test is `lua_type(L, 1) == LUA_TTABLE` (`cmp $0x5`), so a
number, a string or a boolean is not an error — it falls through to the head
and starts the walk over.
- A table is resolved through `T[0]` exactly as our `decode_id` does, and both
rejections raise through `luaL_error` (`0x6f4940`, which never returns) with
the client's own wording: `0x872f08` for a table with no object behind it,
`0x872ecc` for one that is some other kind of object — a region, which is
not in this list at all.
- Regions and the walk's order aside, hidden and anonymous frames are in it:
the link is the ctor's, not the draw list's.
The arena grows the list it already implied. `Frame::insertion_seq` could not
serve: that is the draw-order stamp, and a `Show` or a strata change restamps
it (`resequence_to_tail`), where creation order never moves. So `created` is
the handle list in creation order with `created_seq` the frame's index into
it, and a step is one lookup. A destroyed frame's slot is kept, not
compacted — its handle stops resolving and the walk skips it — because an
index shift would break every other frame's `created_seq`, and nothing in
play destroys a frame anyway, as nothing in 1.12 can.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SgstFWtn1RxEJ5kVrpgYwn
gromandClaude Opus 5
2a51c9817a