affaan-m/ECC · error · anyhow::Error

sample seeds must be unique

Error message

sample seeds must be unique

What it means

compare enforces unique seeds across the paired samples (BTreeSet size vs slice length), mirroring the seed-uniqueness rule of evaluate_paired. It guards the compare path against callers assembling samples by hand with duplicated seeds.

Source

Thrown at ecc2/src/harness_eval.rs:531

        if !self.min_win_rate.is_finite() || !(0.0..=1.0).contains(&self.min_win_rate) {
            bail!("minimum win rate must be between 0 and 1");
        }
        Ok(())
    }

    pub fn compare(self, samples: &[PairedSample]) -> Result<Comparison> {
        self.validate()?;
        if samples.is_empty() {
            bail!("samples cannot be empty");
        }
        if samples
            .iter()
            .map(|sample| sample.seed)
            .collect::<BTreeSet<_>>()
            .len()
            != samples.len()
        {
            bail!("sample seeds must be unique");
        }
        if samples.iter().any(|s| {
            !s.candidate_score.is_finite()
                || !s.baseline_score.is_finite()
                || !(0.0..=1.0).contains(&s.candidate_score)
                || !(0.0..=1.0).contains(&s.baseline_score)
        }) {
            bail!("scores must be finite and between 0 and 1");
        }
        let count = samples.len();
        let candidate_mean = samples.iter().map(|s| s.candidate_score).sum::<f64>() / count as f64;
        let baseline_mean = samples.iter().map(|s| s.baseline_score).sum::<f64>() / count as f64;
        let mean_delta = candidate_mean - baseline_mean;
        let win_rate = samples
            .iter()
            .filter(|s| s.candidate_score > s.baseline_score)
            .count() as f64
            / count as f64;

View on GitHub (pinned to 06c5e118c4)

Solutions

1. Deduplicate sample seeds; each sample must use a distinct seed.
2. Check the seed assignment loop for repeated values.

When it happens

Trigger: Thrown at ecc2/src/harness_eval.rs:531 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of affaan-m/ECC@06c5e118c4 (2026-08-18). Data as JSON: /api/errors/0e79294b52557d83. Report an issue: GitHub.