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Re-encode the read-back fault payload as a wider array header, not a map the decoder refuses

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Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
This commit is contained in:
Meta Vens 2026-10-26 14:54:09 +01:00
commit 242f5a7ef5
1 changed files with 8 additions and 3 deletions
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11
crates/huginn-mind/src/query.rs
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@ -2264,9 +2264,14 @@ mod tests {
#[test]
fn read_back_refuses_a_payload_that_decodes_but_was_encoded_differently() {
let (rows, key) = faulted(|rows, at| {
let named = rmp_serde::to_vec_named(&stored_question(&rows[at])).unwrap();
assert_ne!(named, rows[at].payload, "the re-encoding differs, so the fault is real");
rows[at].payload = named;
// The same array, its header in the wider array16 form: it decodes to the
// same document and encodes to different bytes.
let payload = &rows[at].payload;
assert_eq!(payload[0] & 0xf0, 0x90, "the payload opens with a fixarray header");
let mut wider = vec![0xdc, 0x00, payload[0] & 0x0f];
wider.extend_from_slice(&payload[1..]);
assert_eq!(D::decode(&cultcache_rs::CultCacheEnvelope { payload: wider.clone(), ..rows[at].clone() }).unwrap(), D::Question(stored_question(&rows[at])));
rows[at].payload = wider;
});
refused_with(rows, "re-encode", &key);
}