pub fn validate_no_empty_origin_overrides(d: &Descriptor) -> Result<(), Error>Expand description
Validate that no OriginPathOverrides[idx] entry is present-but-empty
(zero path components). Per spec v0.13 §6.3 (I-1 hardening, P0
pathless/dead-card partial-decode).
Runs UNCONDITIONALLY — regardless of canonical_origin(&d.tree) — so
a CANONICAL-shape wire (e.g. wpkh(@0)) carrying an empty override is
ALSO rejected (I-1a). This is a DISTINCT error variant from
Error::MissingExplicitOrigin so partial-allowing decode (P0.2, which
swallows ONLY MissingExplicitOrigin) never swallows this: a
present-but-empty override is a MALFORMED wire, not a dead card, and
must not partial-render (I-1b, fatal-in-partial).
Converges with crate::canonicalize::expand_per_at_n, which runs
the same check independently (defense in depth for a hand-built
Descriptor that bypasses decode).