{"record":{"id":"db7709b7ee9be4bd","repo":"affaan-m/ECC","slug":"minimum-samples-must-be-positive","errorCode":null,"errorMessage":"minimum samples must be positive","messagePattern":"minimum samples must be positive","errorType":"validation","errorClass":"anyhow::Error","httpStatus":null,"severity":"error","filePath":"ecc2/src/harness_eval.rs","lineNumber":508,"sourceCode":"    pub min_mean_delta: f64,\n    pub min_win_rate: f64,\n}\n\n#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]\npub struct Comparison {\n    pub passed: bool,\n    pub sample_count: usize,\n    pub candidate_mean: f64,\n    pub baseline_mean: f64,\n    pub mean_delta: f64,\n    pub win_rate: f64,\n    pub failures: Vec<String>,\n}\n\nimpl PromotionPolicy {\n    pub fn validate(self) -> Result<()> {\n        if self.min_samples == 0 {\n            bail!(\"minimum samples must be positive\");\n        }\n        if !self.min_mean_delta.is_finite() {\n            bail!(\"minimum mean delta must be finite\");\n        }\n        if !self.min_win_rate.is_finite() || !(0.0..=1.0).contains(&self.min_win_rate) {\n            bail!(\"minimum win rate must be between 0 and 1\");\n        }\n        Ok(())\n    }\n\n    pub fn compare(self, samples: &[PairedSample]) -> Result<Comparison> {\n        self.validate()?;\n        if samples.is_empty() {\n            bail!(\"samples cannot be empty\");\n        }\n        if samples\n            .iter()\n            .map(|sample| sample.seed)","sourceCodeStart":490,"sourceCodeEnd":526,"githubUrl":"https://github.com/affaan-m/ECC/blob/06c5e118c4d3e6c3b7f9445f973a2194c82de193/ecc2/src/harness_eval.rs#L490-L526","documentation":"PromotionPolicy::validate rejects a policy whose min_samples is zero, since a promotion comparison must require at least one paired sample to be meaningful. It fires on a degenerate policy definition before compare runs.","triggerScenarios":"Thrown at ecc2/src/harness_eval.rs:508 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Set minimum samples to a positive integer greater than zero.","Fix config parsing that coerced the value to 0 or a negative number."],"exampleFix":null,"handlingStrategy":"validation","validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"06c5e118c4d3e6c3b7f9445f973a2194c82de193","analyzedAt":"2026-08-18T11:27:13.915Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-14T05:17:10.506Z"}