pub const MAX_JSON_DEPTH: usize = 128;Expand description
Maximum nesting depth of an opaque JSON payload (an island’s props, an
unknown line/container/mark’s attrs) measured in container levels from the
bag itself.
The payload axis of MAX_NESTING_DEPTH: is_value_key_sorted,
sort_keys_owned, and serde_json::Value’s own Drop each recurse one
frame per level, so an unbounded bag overflows the stack, on wasm32, an
unrecoverable trap rather than a catchable error. The bag is refused at the
decode boundary, before it is cloned out of the wire, and
Content::validate restates it as an invariant
for the hand-built content that never went through a decoder.
128 is what serde_json::from_str already enforces, so nothing a stored blob
can carry is refused. The string lane counts from the document root rather
than the bag, so it admits ~3 levels fewer; both bound the recursion, and the
per-bag reading is the one the recursive consumers actually walk.