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ruvnet--RuView/v2
Rahul c00f45e296 fix(sensing): finish #611 NaN-panic audit — 7 more sites missed by #613 (#624)
#613 fixed adaptive_classifier.rs:94 (the IQR sort) and called the audit
done, but the grep used `partial_cmp(b).unwrap()` as a literal and missed
seven additional production sites that use comparator variants:

  adaptive_classifier.rs:205  AdaptiveModel::classify() argmax over softmax
                              probs — same per-frame hot path as #611.
                              NaN flows through normalise → logits → softmax
                              and still reaches this site even after the
                              IQR fix.
  adaptive_classifier.rs:480  train() argmax (training accuracy loop)
  adaptive_classifier.rs:500  train() per-class argmax
  main.rs:2446, 2449          count_persons_mincut variance source/sink select
  csi.rs:602, 605             count_persons_mincut variance source/sink select
                              (duplicate of main.rs logic in csi.rs)

For the variance-select sites, note that the *outer* `unwrap_or((0, &0))`
only catches an empty iterator — it cannot rescue a panic raised inside
the comparator. A single NaN in `variances[]` still aborts the process.

Same fix as #613: swap `.unwrap()` for `.unwrap_or(std::cmp::Ordering::Equal)`
inside the comparator closure. Pure behavioural change, no API surface.

Re-audit of the remaining `partial_cmp(...).unwrap()` matches in v2/:
they are all inside `#[cfg(test)]` / `#[test]` blocks (spectrogram.rs:269,
depth.rs:234, connectivity.rs:477, vital_signs.rs:737) where inputs are
controlled and panic-on-NaN is acceptable.
2026-05-19 10:02:08 -04:00
..