pub const MAX_SPACE_SERIALIZE_DEPTH: usize = 128;Expand description
Greatest space-nesting depth FuncSpace and Ops will serialize.
Both are trees, and serde cannot emit a tree without one native stack
frame per level, so the depth has to be bounded somewhere: past it, the
runtime aborts the process instead of raising a catchable panic
(#1056). A space tree deeper than this fails serialization with an
ordinary serializer error naming the limit.
The value matches the recursion limit serde_json’s Deserializer
already imposes on the same documents, and is generous against both
ends of that comparison. On the read side, a FuncSpace costs two
JSON nesting levels (its object plus its spaces array), so parsing
one of these documents back caps out near 61 levels — the emit limit
is the more permissive of the two. On the source side, the deepest
space nesting across the 14 450-file corpus under tests/repositories
is 10 levels.